동적 라이브러리 연결시 GetProcAddress로 한번에 연결하기

//GetProcAddresses
//Argument1: hLibrary - Handle for the Library Loaded
//Argument2: lpszLibrary - Library to Load
//Argument3: nCount - Number of functions to load
//[Arguments Format]
//Argument4: Function Address - Function address we want to store
//Argument5: Function Name - Name of the function we want
//[Repeat Format]
//
//Returns: FALSE if failure
//Returns: TRUE if successful
BOOL GetProcAddresses( HINSTANCE *hLibrary,
LPCSTR lpszLibrary, INT nCount, ... )
{
va_list va;
va_start( va, nCount );

if ( ( *hLibrary = LoadLibrary( lpszLibrary ) )
!= NULL )
{
FARPROC * lpfProcFunction = NULL;
LPSTR lpszFuncName = NULL;
INT nIdxCount = 0;
while ( nIdxCount < nCount )
{
lpfProcFunction = va_arg( va, FARPROC* );
lpszFuncName = va_arg( va, LPSTR );
if ( ( *lpfProcFunction =
GetProcAddress( *hLibrary,
lpszFuncName ) ) == NULL )
{
lpfProcFunction = NULL;
return FALSE;
}
nIdxCount++;
}
}
else
{
va_end( va );
return FALSE;
}
va_end( va );
return TRUE;
}

 

 

실제 사용예..

#include <windows.h>

typedef int ( WINAPI *MESSAGEBOX )
( HWND , LPCSTR, LPCSTR, DWORD );
typedef int ( WINAPI *MESSAGEBOXEX )
( HWND , LPCSTR, LPCSTR, DWORD , WORD );

void main(void)
{
MESSAGEBOX lpfMsgBox = NULL;
MESSAGEBOXEX lpfMsgBoxEx = NULL;
HINSTANCE hLib;
if(GetProcAddresses( &hLib, "User32.dll", 2,
&lpfMsgBox, "MessageBoxA",
&lpfMsgBoxEx, "MessageBoxExA" ) )
{
lpfMsgBox( 0, "Test1", "Test1", MB_OK );
lpfMsgBoxEx( 0, "Test2", "Test2", MB_OK,
MAKELANGID( LANG_ENGLISH, SUBLANG_ENGLISH_US ) );
}
if ( hLib != NULL )
FreeLibrary( hLib );
}