AfxGetApp()->m_pszExeName; // Get the "MyExe" portion of "MyExe.exe". Or, "MyDll" if RunDll32 is used.

dllName.Append( ".exe" ); // Now has "MyExe.exe" (or "MyDll.dll").

HMODULE hmod = GetModuleHandle(dllName);  

CString fullPath;
DWORD pathLen = ::GetModuleFileName( hmod, fullPath.GetBufferSetLength(MAX_PATH+1), MAX_PATH); // hmod of zero gets the main EXE
fullPath.ReleaseBuffer( pathLen ); // Note that ReleaseBuffer doesn't need a +1 for the null byte.

AfxGetApp()->m_pszExeName; // Get the "MyExe" portion of "MyExe.exe". Or, "MyDll" if RunDll32 is used.


dllName.Append( ".dll" ); // Now has "MyDll.dll".

HMODULE hmod = GetModuleHandle(dllName);  

CString fullPath;
DWORD pathLen = ::GetModuleFileName( hmod, fullPath.GetBufferSetLength(MAX_PATH+1), MAX_PATH); // hmod of zero gets the main EXE
fullPath.ReleaseBuffer( pathLen ); // Note that ReleaseBuffer doesn't need a +1 for the null byte.

AfxGetApp()->m_pszExeName; // Get EXE name


...or, get path info...

// With CString
char    szAppPath[MAX_PATH] = "";
::GetModuleFileName(0, szAppPath, MAX_PATH); // get path

// Extract name
CString strAppName;
strAppName = szAppPath;
strAppName = strAppName.Right(strAppName.ReverseFind('\\') + 1);

http://www.codeguru.com/forum/showthread.php?t=312468

For C++ MFC applications, this code gets the full path of the application (even if the application is a DLL run with RunDll32).

Get application's  full path, MFC, using AfxGetApp()->m_pszExeName, GetModuleHandle and GetModuleFileName

C++