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Ctrl-Alt-Delete: The Close Program Box

Posted on 1998-12-16
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Last Modified: 2013-11-20
I'm attempting to prevent my application's name from being seen in the close program box

I've added the following code in the proper sections that contains the InitInstance function.

  #define REGISTER 0
  #define UNREGISTER 1

to the top of your main source code file (the one with the InitInstance function in it).  Then add:

  typedef DWORD (WINAPI *fp_RegServProc) (DWORD, DWORD);
  fp_RegServProc pRegisterServiceProcess = NULL;

  pRegisterServiceProcess = (fp_RegServProc) GetProcAddress (GetModuleHandle ("KERNEL32.dll"), "RegisterServiceProcess");

  (pRegisterServiceProcess)(0, UNREGISTER);

to your InitInstance member function.  

Yet it doesn't work.
What have I done wrong????
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Question by:lynn402
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9 Comments
 
LVL 86

Expert Comment

by:jkr
ID: 1326242
The problem is simply the way to obtain the DLL module handle. Change the code to read
HANDLE hDll = LoadLibrary ( "kernel32.dll");

  pRegisterServiceProcess = (fp_RegServProc) GetProcAddress (hDll, "RegisterServiceProcess");

  (pRegisterServiceProcess)(GetCurrentProcessId(), UNREGISTER);

BTW: the correct operation codes for this function:

// from http://support.microsoft.com/support/kb/articles/q125/7/14.asp,
// How to Start an Application at Boot Time Under Windows 95
// Last reviewed: September 25, 1995
// Article ID: Q125714

// Define                    Value       Meaning
#define RSP_SIMPLE_SERVICE        0x00000001      // Registers the process as a
                                                                        // simple service process.
#define RSP_UNREGISTER_SERVICE    0x00000000      // Unregisters the process as a
                                                                        // service process.

0
 

Author Comment

by:lynn402
ID: 1326243
Now when I compile my program I get a spawning error --"error spawning c1.exe"
0
 

Author Comment

by:lynn402
ID: 1326244
CORRECTION: the error I'm getting is c2664: cannot convert param 1 from 'void *' to 'struct HINSTANCE__*'
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LVL 86

Expert Comment

by:jkr
ID: 1326245
Check your include path!!! This error usually occurs when outdated (Win16!) header files are involved (formerly, 'LoadLibrary()' indeed returned a 'struct HINSTANCE', whereas it returns 'void*' nowadays...). Here some code that compiles AND works:

typedef DWORD ( *RSPPROC)   (   DWORD,  DWORD);

RSPPROC RegisterServiceProcess;


            g_hSvcDll   =   LoadLibrary (   "kernel32.dll");

            if  (   !g_hSvcDll)
                {
                    // error
                }

            RegisterServiceProcess  =   ( RSPPROC)  GetProcAddress  (   g_hSvcDll,
                                                                        "RegisterServiceProcess"
                                                                    );

            if  (   !RegisterServiceProcess)
                {
                    FreeLibrary (   g_hSvcDll);
                }
             else
                {
                    if  (   !RegisterServiceProcess (   GetCurrentProcessId (),
                                                        RSP_SIMPLE_SERVICE
                                                    )
                        )
                        {
                            // error
                        }
                }

0
 
LVL 23

Expert Comment

by:chensu
ID: 1326246
GetModuleHandle is OK.

The following code should work.

// Registers the process as a simple service process.
#define RSP_SIMPLE_SERVICE        0x00000001
// Unregisters the process as a service process.
#define RSP_UNREGISTER_SERVICE    0x00000000
// ...
 typedef DWORD (WINAPI *fp_RegServProc)(DWORD dwProcessId,DWORD dwType);
 fp_RegServProc fncptr=NULL;
// ...
HMODULE hModule = ::GetModuleHandle(TEXT("kernel32.dll"));
fncptr=(fp_RegServProc)::GetProcAddress(hModule, "RegisterServiceProcess");
if (fncptr!=NULL)
    (*fncptr)(0, RSP_SIMPLE_SERVICE);

0
 

Author Comment

by:lynn402
ID: 1326247
It's working now.Thanks, JKR
0
 
LVL 86

Expert Comment

by:jkr
ID: 1326248
Fine! Do you think i may lock the Q?
0
 

Author Comment

by:lynn402
ID: 1326249
Yes. Lock the question. It seems that expert exchange isn't presenting me with the options of whether to accept or refuse a person's solution.


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LVL 86

Accepted Solution

by:
jkr earned 50 total points
ID: 1326250
Thanks! ;-)
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