/[rdesktop]/sourceforge.net/trunk/seamlessrdp/ServerExe/HookDll/hook.cpp
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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revision 929 by astrand, Thu Jun 30 08:53:04 2005 UTC revision 930 by astrand, Thu Jun 30 14:14:56 2005 UTC
# Line 1  Line 1 
1  //*********************************************************************************  //*********************************************************************************
2  //  //
3  //Title: Terminal Services Window Clipper  //Title: Terminal Services Window Clipper
4  //  //
5  //Author: Martin Wickett  //Author: Martin Wickett
6  //  //
7  //Date: 2004  //Date: 2004
8  //  //
9  //*********************************************************************************  //*********************************************************************************
10    
11  #include "hook.h"  #include "hook.h"
12    
13  HINSTANCE                       WTSWinClipper::mCbtDllHinst                       = 0;  HINSTANCE                       WTSWinClipper::mCbtDllHinst                       = 0;
14  SETHOOKS                        WTSWinClipper::mSetCbtHook                    = 0;  SETHOOKS                        WTSWinClipper::mSetCbtHook                    = 0;
15  REMOVEHOOKS             WTSWinClipper::mRemoveCbtHook             = 0;  REMOVEHOOKS             WTSWinClipper::mRemoveCbtHook             = 0;
16  GETINSTANCECOUNT        WTSWinClipper::mGetInstanceCount          = 0;  GETINSTANCECOUNT        WTSWinClipper::mGetInstanceCount          = 0;
17    
18  bool WTSWinClipper::Init()  bool WTSWinClipper::Init()
19  {  {
20          if (mCbtDllHinst) return true;          if (mCbtDllHinst) return true;
21    
22          while (true)          while (true)
23          {          {
24                  // try to load hookdll.dll                  // try to load hookdll.dll
25                  if (! (mCbtDllHinst = LoadLibrary("hookdll.dll")))                  if (! (mCbtDllHinst = LoadLibrary("hookdll.dll")))
26                          break;                          break;
27    
28                  // check number of instances                  // check number of instances
29                  if (! (mGetInstanceCount = (GETINSTANCECOUNT)GetProcAddress(mCbtDllHinst, "GetInstanceCount")))                  if (! (mGetInstanceCount = (GETINSTANCECOUNT)GetProcAddress(mCbtDllHinst, "GetInstanceCount")))
30                          break;                          break;
31    
32    
33                  // get our hook function                  // get our hook function
34                  if (! (mSetCbtHook = (SETHOOKS)GetProcAddress(mCbtDllHinst, "SetCbtHook")))                  if (! (mSetCbtHook = (SETHOOKS)GetProcAddress(mCbtDllHinst, "SetCbtHook")))
35                          break;                          break;
36    
37                  // get our unkook function                  // get our unkook function
38                  if (! (mRemoveCbtHook = (REMOVEHOOKS)GetProcAddress(mCbtDllHinst, "RemoveCbtHook")))                  if (! (mRemoveCbtHook = (REMOVEHOOKS)GetProcAddress(mCbtDllHinst, "RemoveCbtHook")))
39                          break;                          break;
40    
41                  // report success                  // report success
42                  return true;                  return true;
43          }          }
44    
45          // if we got here something went wrong          // if we got here something went wrong
46          if (mCbtDllHinst)          if (mCbtDllHinst)
47          {          {
48                  FreeLibrary(mCbtDllHinst);                  FreeLibrary(mCbtDllHinst);
49                  mCbtDllHinst = 0;                  mCbtDllHinst = 0;
50          }          }
51    
52          return false;          return false;
53  }  }
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