seamlessrdp/ServerExe/main.c

/* -*- c-basic-offset: 8 -*-
   rdesktop: A Remote Desktop Protocol client.
   Seamless windows - Remote server executable

   Based on code copyright (C) 2004-2005 Martin Wickett

   Copyright (C) Peter Åstrand <astrand@cendio.se> 2005-2006
   Copyright (C) Pierre Ossman <ossman@cendio.se> 2006

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include <windows.h>
#include <stdio.h>
#include <wtsapi32.h>
#include <cchannel.h>

#include "vchannel.h"

#include "resource.h"

#define APP_NAME "SeamlessRDP Shell"

#ifndef WM_WTSSESSION_CHANGE
#define WM_WTSSESSION_CHANGE 0x02B1
#endif
#ifndef WTS_REMOTE_CONNECT
#define WTS_REMOTE_CONNECT 0x3
#endif

/* Global data */
static HINSTANCE g_instance;
static HWND g_hwnd;

typedef void (*set_hooks_proc_t) ();
typedef void (*remove_hooks_proc_t) ();
typedef int (*get_instance_count_proc_t) ();

typedef void (*move_window_proc_t) (unsigned int serial, HWND hwnd, int x, int y, int width,
                                    int height);
typedef void (*zchange_proc_t) (unsigned int serial, HWND hwnd, HWND behind);
typedef void (*focus_proc_t) (unsigned int serial, HWND hwnd);
typedef void (*set_state_proc_t) (unsigned int serial, HWND hwnd, int state);

static move_window_proc_t g_move_window_fn = NULL;
static zchange_proc_t g_zchange_fn = NULL;
static focus_proc_t g_focus_fn = NULL;
static set_state_proc_t g_set_state_fn = NULL;

static void
message(const char *text)
{
        MessageBox(GetDesktopWindow(), text, "SeamlessRDP Shell", MB_OK);
}

static char *
get_token(char **s)
{
        char *comma, *head;
        head = *s;

        if (!head)
                return NULL;

        comma = strchr(head, ',');
        if (comma)
        {
                *comma = '\0';
                *s = comma + 1;
        }
        else
        {
                *s = NULL;
        }

        return head;
}

static BOOL CALLBACK
enum_cb(HWND hwnd, LPARAM lparam)
{
        RECT rect;
        unsigned short title[150];
        LONG styles;
        int state;
        HWND parent;

        styles = GetWindowLong(hwnd, GWL_STYLE);

        if (!(styles & WS_VISIBLE))
                return TRUE;

        if (styles & WS_POPUP)
                parent = (HWND) GetWindowLong(hwnd, GWL_HWNDPARENT);
        else
                parent = NULL;

        vchannel_write("CREATE", "0x%p,0x%p,0x%x", hwnd, parent, 0);

        if (!GetWindowRect(hwnd, &rect))
        {
                debug("GetWindowRect failed!");
                return TRUE;
        }

        vchannel_write("POSITION", "0x%p,%d,%d,%d,%d,0x%x",
                       hwnd,
                       rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, 0);

        GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title));

        vchannel_write("TITLE", "0x%x,%s,0x%x", hwnd, vchannel_strfilter_unicode(title), 0);

        if (styles & WS_MAXIMIZE)
                state = 2;
        else if (styles & WS_MINIMIZE)
                state = 1;
        else
                state = 0;

        vchannel_write("STATE", "0x%p,0x%x,0x%x", hwnd, state, 0);

        return TRUE;
}

static void
do_sync(void)
{
        vchannel_block();

        vchannel_write("SYNCBEGIN", "0x0");

        EnumWindows(enum_cb, 0);

        vchannel_write("SYNCEND", "0x0");

        vchannel_unblock();
}

static void
do_state(unsigned int serial, HWND hwnd, int state)
{
        g_set_state_fn(serial, hwnd, state);
}

static void
do_position(unsigned int serial, HWND hwnd, int x, int y, int width, int height)
{
        g_move_window_fn(serial, hwnd, x, y, width, height);
}

static void
do_zchange(unsigned int serial, HWND hwnd, HWND behind)
{
        g_zchange_fn(serial, hwnd, behind);
}

static void
do_focus(unsigned int serial, HWND hwnd)
{
        g_focus_fn(serial, hwnd);
}

static void
process_cmds(void)
{
        char line[VCHANNEL_MAX_LINE];
        int size;

        char *p, *tok1, *tok2, *tok3, *tok4, *tok5, *tok6, *tok7, *tok8;

        while ((size = vchannel_read(line, sizeof(line))) >= 0)
        {
                p = line;

                tok1 = get_token(&p);
                tok2 = get_token(&p);
                tok3 = get_token(&p);
                tok4 = get_token(&p);
                tok5 = get_token(&p);
                tok6 = get_token(&p);
                tok7 = get_token(&p);
                tok8 = get_token(&p);

                if (strcmp(tok1, "SYNC") == 0)
                        do_sync();
                else if (strcmp(tok1, "STATE") == 0)
                        do_state(strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0),
                                 strtol(tok4, NULL, 0));
                else if (strcmp(tok1, "POSITION") == 0)
                        do_position(strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0),
                                    strtol(tok4, NULL, 0), strtol(tok5, NULL, 0), strtol(tok6, NULL,
                                                                                         0),
                                    strtol(tok7, NULL, 0));
                else if (strcmp(tok1, "ZCHANGE") == 0)
                        do_zchange(strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0),
                                   (HWND) strtoul(tok4, NULL, 0));
                else if (strcmp(tok1, "FOCUS") == 0)
                        do_focus(strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0));
        }
}

static LRESULT CALLBACK
wndproc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
{
        if (message == WM_WTSSESSION_CHANGE)
        {
                if (wparam == WTS_REMOTE_CONNECT)
                {
                        /* These get reset on each reconnect */
                        SystemParametersInfo(SPI_SETDRAGFULLWINDOWS, TRUE, NULL, 0);
                        SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE, NULL, 0);
                        vchannel_write("HELLO", "0x%08x", 1);
                }
        }

        return DefWindowProc(hwnd, message, wparam, lparam);
}

static BOOL
register_class(void)
{
        WNDCLASSEX wcx;

        memset(&wcx, 0, sizeof(wcx));

        wcx.cbSize = sizeof(wcx);
        wcx.lpfnWndProc = wndproc;
        wcx.hInstance = g_instance;
        wcx.lpszClassName = "SeamlessClass";

        return RegisterClassEx(&wcx);
}

static BOOL
create_wnd(void)
{
        if (!register_class())
                return FALSE;

        g_hwnd = CreateWindow("SeamlessClass",
                              "Seamless Window",
                              WS_OVERLAPPEDWINDOW,
                              CW_USEDEFAULT,
                              CW_USEDEFAULT,
                              CW_USEDEFAULT,
                              CW_USEDEFAULT, (HWND) NULL, (HMENU) NULL, g_instance, (LPVOID) NULL);

        if (!g_hwnd)
                return FALSE;

        return TRUE;
}

int WINAPI
WinMain(HINSTANCE instance, HINSTANCE prev_instance, LPSTR cmdline, int cmdshow)
{
        HMODULE hookdll;

        set_hooks_proc_t set_hooks_fn;
        remove_hooks_proc_t remove_hooks_fn;
        get_instance_count_proc_t instance_count_fn;

        g_instance = instance;

        hookdll = LoadLibrary("seamlessrdp.dll");
        if (!hookdll)
        {
                message("Could not load hook DLL. Unable to continue.");
                return -1;
        }

        set_hooks_fn = (set_hooks_proc_t) GetProcAddress(hookdll, "SetHooks");
        remove_hooks_fn = (remove_hooks_proc_t) GetProcAddress(hookdll, "RemoveHooks");
        instance_count_fn = (get_instance_count_proc_t) GetProcAddress(hookdll, "GetInstanceCount");
        g_move_window_fn = (move_window_proc_t) GetProcAddress(hookdll, "SafeMoveWindow");
        g_zchange_fn = (zchange_proc_t) GetProcAddress(hookdll, "SafeZChange");
        g_focus_fn = (focus_proc_t) GetProcAddress(hookdll, "SafeFocus");
        g_set_state_fn = (set_state_proc_t) GetProcAddress(hookdll, "SafeSetState");

        if (!set_hooks_fn || !remove_hooks_fn || !instance_count_fn || !g_move_window_fn
            || !g_zchange_fn || !g_focus_fn || !g_set_state_fn)
        {
                FreeLibrary(hookdll);
                message("Hook DLL doesn't contain the correct functions. Unable to continue.");
                return -1;
        }

        /* Check if the DLL is already loaded */
        if (instance_count_fn() != 1)
        {
                FreeLibrary(hookdll);
                message("Another running instance of Seamless RDP detected.");
                return -1;
        }

        if (!create_wnd())
        {
                FreeLibrary(hookdll);
                message("Couldn't create a window to catch events.");
                return -1;
        }

        WTSRegisterSessionNotification(g_hwnd, NOTIFY_FOR_THIS_SESSION);

        vchannel_open();

        vchannel_write("HELLO", "0x%08x", 0);

        set_hooks_fn();

        /* Since we don't see the entire desktop we must resize windows
           immediatly. */
        SystemParametersInfo(SPI_SETDRAGFULLWINDOWS, TRUE, NULL, 0);

        /* Disable screen saver since we cannot catch its windows. */
        SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE, NULL, 0);

        if (strlen(cmdline) == 0)
        {
                message("No command line specified.");
                return -1;
        }
        else
        {
                BOOL result;
                DWORD exitcode;
                PROCESS_INFORMATION proc_info;
                STARTUPINFO startup_info;
                MSG msg;

                memset(&startup_info, 0, sizeof(STARTUPINFO));
                startup_info.cb = sizeof(STARTUPINFO);

                result = CreateProcess(NULL, cmdline, NULL, NULL, FALSE, 0,
                                       NULL, NULL, &startup_info, &proc_info);

                if (result)
                {
                        do
                        {
                                while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
                                {
                                        TranslateMessage(&msg);
                                        DispatchMessage(&msg);
                                }
                                process_cmds();
                                Sleep(100);
                                GetExitCodeProcess(proc_info.hProcess, &exitcode);
                        }
                        while (exitcode == STILL_ACTIVE);

                        // Release handles
                        CloseHandle(proc_info.hProcess);
                        CloseHandle(proc_info.hThread);
                }
                else
                {
                        // CreateProcess failed.
                        char msg[256];
                        _snprintf(msg, sizeof(msg),
                                  "Unable to launch the requested application:\n%s", cmdline);
                        message(msg);
                }
        }

        WTSUnRegisterSessionNotification(g_hwnd);

        remove_hooks_fn();

        FreeLibrary(hookdll);

        vchannel_close();

        return 1;
}
1	ossman_	1071	/* -- c-basic-offset: 8 --
2			rdesktop: A Remote Desktop Protocol client.
3			Seamless windows - Remote server executable
4	ossman_	1069
5	ossman_	1071	Based on code copyright (C) 2004-2005 Martin Wickett
6	ossman_	1069
7	ossman_	1071	Copyright (C) Peter Åstrand <astrand@cendio.se> 2005-2006
8			Copyright (C) Pierre Ossman <ossman@cendio.se> 2006
9	ossman_	1069
10	ossman_	1071	This program is free software; you can redistribute it and/or modify
11			it under the terms of the GNU General Public License as published by
12			the Free Software Foundation; either version 2 of the License, or
13			(at your option) any later version.
14	ossman_	1069
15	ossman_	1071	This program is distributed in the hope that it will be useful,
16			but WITHOUT ANY WARRANTY; without even the implied warranty of
17			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18			GNU General Public License for more details.
19	ossman_	1069
20	ossman_	1071	You should have received a copy of the GNU General Public License
21			along with this program; if not, write to the Free Software
22			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23			*/
24	ossman_	1069
25	ossman_	1071	#include <windows.h>
26			#include <stdio.h>
27	ossman_	1147	#include <wtsapi32.h>
28			#include <cchannel.h>
29	ossman_	1069
30	ossman_	1074	#include "vchannel.h"
31
32	ossman_	1071	#include "resource.h"
33	ossman_	1069
34	ossman_	1071	#define APP_NAME "SeamlessRDP Shell"
35	ossman_	1069
36	ossman_	1147	#ifndef WM_WTSSESSION_CHANGE
37			#define WM_WTSSESSION_CHANGE 0x02B1
38			#endif
39			#ifndef WTS_REMOTE_CONNECT
40			#define WTS_REMOTE_CONNECT 0x3
41			#endif
42
43	ossman_	1071	/* Global data */
44			static HINSTANCE g_instance;
45	ossman_	1147	static HWND g_hwnd;
46	ossman_	1069
47	ossman_	1071	typedef void (*set_hooks_proc_t) ();
48			typedef void (*remove_hooks_proc_t) ();
49			typedef int (*get_instance_count_proc_t) ();
50	ossman_	1069
51	ossman_	1165	typedef void (*move_window_proc_t) (unsigned int serial, HWND hwnd, int x, int y, int width,
52			int height);
53			typedef void (*zchange_proc_t) (unsigned int serial, HWND hwnd, HWND behind);
54			typedef void (*focus_proc_t) (unsigned int serial, HWND hwnd);
55			typedef void (*set_state_proc_t) (unsigned int serial, HWND hwnd, int state);
56	ossman_	1145
57			static move_window_proc_t g_move_window_fn = NULL;
58	ossman_	1158	static zchange_proc_t g_zchange_fn = NULL;
59			static focus_proc_t g_focus_fn = NULL;
60	ossman_	1160	static set_state_proc_t g_set_state_fn = NULL;
61	ossman_	1145
62	ossman_	1071	static void
63			message(const char *text)
64	ossman_	1069	{
65	ossman_	1071	MessageBox(GetDesktopWindow(), text, "SeamlessRDP Shell", MB_OK);
66	ossman_	1069	}
67
68	ossman_	1075	static char *
69			get_token(char **s)
70			{
71			char comma, head;
72			head = *s;
73
74			if (!head)
75			return NULL;
76
77			comma = strchr(head, ',');
78			if (comma)
79			{
80			*comma = '\0';
81			*s = comma + 1;
82			}
83			else
84			{
85			*s = NULL;
86			}
87
88			return head;
89			}
90
91	ossman_	1078	static BOOL CALLBACK
92			enum_cb(HWND hwnd, LPARAM lparam)
93	ossman_	1075	{
94			RECT rect;
95	ossman_	1135	unsigned short title[150];
96	ossman_	1075	LONG styles;
97			int state;
98	ossman_	1097	HWND parent;
99	ossman_	1075
100			styles = GetWindowLong(hwnd, GWL_STYLE);
101
102			if (!(styles & WS_VISIBLE))
103			return TRUE;
104
105	ossman_	1097	if (styles & WS_POPUP)
106			parent = (HWND) GetWindowLong(hwnd, GWL_HWNDPARENT);
107			else
108			parent = NULL;
109	ossman_	1075
110	ossman_	1163	vchannel_write("CREATE", "0x%p,0x%p,0x%x", hwnd, parent, 0);
111	ossman_	1097
112	ossman_	1078	if (!GetWindowRect(hwnd, &rect))
113			{
114	ossman_	1075	debug("GetWindowRect failed!");
115			return TRUE;
116			}
117
118	ossman_	1163	vchannel_write("POSITION", "0x%p,%d,%d,%d,%d,0x%x",
119	ossman_	1075	hwnd,
120	ossman_	1078	rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, 0);
121	ossman_	1075
122	ossman_	1135	GetWindowTextW(hwnd, title, sizeof(title) / sizeof(*title));
123	ossman_	1075
124	ossman_	1163	vchannel_write("TITLE", "0x%x,%s,0x%x", hwnd, vchannel_strfilter_unicode(title), 0);
125	ossman_	1075
126			if (styles & WS_MAXIMIZE)
127			state = 2;
128			else if (styles & WS_MINIMIZE)
129			state = 1;
130			else
131			state = 0;
132
133	ossman_	1163	vchannel_write("STATE", "0x%p,0x%x,0x%x", hwnd, state, 0);
134	ossman_	1075
135			return TRUE;
136			}
137
138	ossman_	1074	static void
139	ossman_	1075	do_sync(void)
140			{
141			vchannel_block();
142
143	ossman_	1163	vchannel_write("SYNCBEGIN", "0x0");
144	ossman_	1075
145			EnumWindows(enum_cb, 0);
146
147	ossman_	1163	vchannel_write("SYNCEND", "0x0");
148	ossman_	1075
149			vchannel_unblock();
150			}
151
152			static void
153	ossman_	1163	do_state(unsigned int serial, HWND hwnd, int state)
154	ossman_	1111	{
155	ossman_	1165	g_set_state_fn(serial, hwnd, state);
156	ossman_	1111	}
157
158			static void
159	ossman_	1163	do_position(unsigned int serial, HWND hwnd, int x, int y, int width, int height)
160	ossman_	1112	{
161	ossman_	1165	g_move_window_fn(serial, hwnd, x, y, width, height);
162	ossman_	1112	}
163
164			static void
165	ossman_	1163	do_zchange(unsigned int serial, HWND hwnd, HWND behind)
166	ossman_	1112	{
167	ossman_	1165	g_zchange_fn(serial, hwnd, behind);
168	ossman_	1112	}
169
170			static void
171	ossman_	1163	do_focus(unsigned int serial, HWND hwnd)
172	ossman_	1153	{
173	ossman_	1165	g_focus_fn(serial, hwnd);
174	ossman_	1153	}
175
176			static void
177	ossman_	1074	process_cmds(void)
178			{
179			char line[VCHANNEL_MAX_LINE];
180			int size;
181
182	ossman_	1075	char p, tok1, tok2, tok3, tok4, tok5, tok6, tok7, *tok8;
183
184	ossman_	1078	while ((size = vchannel_read(line, sizeof(line))) >= 0)
185			{
186	ossman_	1075	p = line;
187
188			tok1 = get_token(&p);
189			tok2 = get_token(&p);
190			tok3 = get_token(&p);
191			tok4 = get_token(&p);
192			tok5 = get_token(&p);
193			tok6 = get_token(&p);
194			tok7 = get_token(&p);
195			tok8 = get_token(&p);
196
197			if (strcmp(tok1, "SYNC") == 0)
198			do_sync();
199	ossman_	1111	else if (strcmp(tok1, "STATE") == 0)
200	ossman_	1163	do_state(strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0),
201			strtol(tok4, NULL, 0));
202	ossman_	1112	else if (strcmp(tok1, "POSITION") == 0)
203	ossman_	1163	do_position(strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0),
204	ossman_	1112	strtol(tok4, NULL, 0), strtol(tok5, NULL, 0), strtol(tok6, NULL,
205	ossman_	1163	0),
206			strtol(tok7, NULL, 0));
207	ossman_	1112	else if (strcmp(tok1, "ZCHANGE") == 0)
208	ossman_	1163	do_zchange(strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0),
209			(HWND) strtoul(tok4, NULL, 0));
210	ossman_	1153	else if (strcmp(tok1, "FOCUS") == 0)
211	ossman_	1163	do_focus(strtoul(tok2, NULL, 0), (HWND) strtoul(tok3, NULL, 0));
212	ossman_	1074	}
213			}
214
215	ossman_	1147	static LRESULT CALLBACK
216			wndproc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
217			{
218			if (message == WM_WTSSESSION_CHANGE)
219			{
220			if (wparam == WTS_REMOTE_CONNECT)
221	ossman_	1150	{
222			/* These get reset on each reconnect */
223			SystemParametersInfo(SPI_SETDRAGFULLWINDOWS, TRUE, NULL, 0);
224			SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE, NULL, 0);
225	ossman_	1163	vchannel_write("HELLO", "0x%08x", 1);
226	ossman_	1150	}
227	ossman_	1147	}
228
229			return DefWindowProc(hwnd, message, wparam, lparam);
230			}
231
232			static BOOL
233			register_class(void)
234			{
235			WNDCLASSEX wcx;
236
237			memset(&wcx, 0, sizeof(wcx));
238
239			wcx.cbSize = sizeof(wcx);
240			wcx.lpfnWndProc = wndproc;
241			wcx.hInstance = g_instance;
242			wcx.lpszClassName = "SeamlessClass";
243
244			return RegisterClassEx(&wcx);
245			}
246
247			static BOOL
248			create_wnd(void)
249			{
250			if (!register_class())
251			return FALSE;
252
253			g_hwnd = CreateWindow("SeamlessClass",
254			"Seamless Window",
255			WS_OVERLAPPEDWINDOW,
256			CW_USEDEFAULT,
257			CW_USEDEFAULT,
258			CW_USEDEFAULT,
259			CW_USEDEFAULT, (HWND) NULL, (HMENU) NULL, g_instance, (LPVOID) NULL);
260
261			if (!g_hwnd)
262			return FALSE;
263
264			return TRUE;
265			}
266
267	ossman_	1071	int WINAPI
268			WinMain(HINSTANCE instance, HINSTANCE prev_instance, LPSTR cmdline, int cmdshow)
269	ossman_	1069	{
270	ossman_	1071	HMODULE hookdll;
271	ossman_	1069
272	ossman_	1071	set_hooks_proc_t set_hooks_fn;
273			remove_hooks_proc_t remove_hooks_fn;
274			get_instance_count_proc_t instance_count_fn;
275	ossman_	1069
276	ossman_	1071	g_instance = instance;
277	ossman_	1069
278	ossman_	1084	hookdll = LoadLibrary("seamlessrdp.dll");
279	ossman_	1071	if (!hookdll)
280			{
281			message("Could not load hook DLL. Unable to continue.");
282			return -1;
283			}
284	ossman_	1069
285	ossman_	1071	set_hooks_fn = (set_hooks_proc_t) GetProcAddress(hookdll, "SetHooks");
286			remove_hooks_fn = (remove_hooks_proc_t) GetProcAddress(hookdll, "RemoveHooks");
287			instance_count_fn = (get_instance_count_proc_t) GetProcAddress(hookdll, "GetInstanceCount");
288	ossman_	1145	g_move_window_fn = (move_window_proc_t) GetProcAddress(hookdll, "SafeMoveWindow");
289	ossman_	1158	g_zchange_fn = (zchange_proc_t) GetProcAddress(hookdll, "SafeZChange");
290			g_focus_fn = (focus_proc_t) GetProcAddress(hookdll, "SafeFocus");
291	ossman_	1160	g_set_state_fn = (set_state_proc_t) GetProcAddress(hookdll, "SafeSetState");
292	ossman_	1069
293	ossman_	1158	if (!set_hooks_fn \|\| !remove_hooks_fn \|\| !instance_count_fn \|\| !g_move_window_fn
294	ossman_	1160	\|\| !g_zchange_fn \|\| !g_focus_fn \|\| !g_set_state_fn)
295	ossman_	1071	{
296			FreeLibrary(hookdll);
297			message("Hook DLL doesn't contain the correct functions. Unable to continue.");
298			return -1;
299			}
300	ossman_	1069
301	ossman_	1071	/* Check if the DLL is already loaded */
302			if (instance_count_fn() != 1)
303			{
304			FreeLibrary(hookdll);
305			message("Another running instance of Seamless RDP detected.");
306			return -1;
307			}
308	ossman_	1069
309	ossman_	1147	if (!create_wnd())
310			{
311			FreeLibrary(hookdll);
312			message("Couldn't create a window to catch events.");
313			return -1;
314			}
315
316			WTSRegisterSessionNotification(g_hwnd, NOTIFY_FOR_THIS_SESSION);
317
318	ossman_	1074	vchannel_open();
319
320	ossman_	1163	vchannel_write("HELLO", "0x%08x", 0);
321	ossman_	1147
322	ossman_	1071	set_hooks_fn();
323	ossman_	1069
324	ossman_	1077	/* Since we don't see the entire desktop we must resize windows
325			immediatly. */
326			SystemParametersInfo(SPI_SETDRAGFULLWINDOWS, TRUE, NULL, 0);
327
328	ossman_	1093	/* Disable screen saver since we cannot catch its windows. */
329			SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE, NULL, 0);
330
331	ossman_	1071	if (strlen(cmdline) == 0)
332			{
333			message("No command line specified.");
334			return -1;
335			}
336			else
337			{
338			BOOL result;
339			DWORD exitcode;
340			PROCESS_INFORMATION proc_info;
341			STARTUPINFO startup_info;
342	ossman_	1147	MSG msg;
343	ossman_	1069
344	ossman_	1071	memset(&startup_info, 0, sizeof(STARTUPINFO));
345			startup_info.cb = sizeof(STARTUPINFO);
346	ossman_	1069
347	ossman_	1071	result = CreateProcess(NULL, cmdline, NULL, NULL, FALSE, 0,
348			NULL, NULL, &startup_info, &proc_info);
349	ossman_	1069
350	ossman_	1071	if (result)
351			{
352			do
353			{
354	ossman_	1147	while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
355			{
356			TranslateMessage(&msg);
357			DispatchMessage(&msg);
358			}
359	ossman_	1074	process_cmds();
360			Sleep(100);
361	ossman_	1071	GetExitCodeProcess(proc_info.hProcess, &exitcode);
362			}
363			while (exitcode == STILL_ACTIVE);
364	ossman_	1069
365	ossman_	1071	// Release handles
366			CloseHandle(proc_info.hProcess);
367			CloseHandle(proc_info.hThread);
368			}
369			else
370			{
371			// CreateProcess failed.
372			char msg[256];
373			_snprintf(msg, sizeof(msg),
374			"Unable to launch the requested application:\n%s", cmdline);
375			message(msg);
376			}
377			}
378	ossman_	1069
379	ossman_	1147	WTSUnRegisterSessionNotification(g_hwnd);
380
381	ossman_	1071	remove_hooks_fn();
382	ossman_	1069
383	ossman_	1071	FreeLibrary(hookdll);
384	ossman_	1069
385	ossman_	1074	vchannel_close();
386
387	ossman_	1071	return 1;
388	ossman_	1069	}