TryToGetDC.c File Reference

#include <Windows.h>

Include dependency graph for TryToGetDC.c:

Go to the source code of this file.

Defines
#define	MSG_ERROR20   "ERROR"
#define	MSG_ERROR36   "Error : GetDC fails"
#define	MSG_ERROR37   "Error : GetDC Input don't handle NULL"
Functions
HDC	TryToGetDC (HWND hWnd)

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Define Documentation

#define MSG_ERROR20   "ERROR"

Definition at line 7 of file TryToGetDC.c.

#define MSG_ERROR36   "Error : GetDC fails"

Definition at line 8 of file TryToGetDC.c.

#define MSG_ERROR37   "Error : GetDC Input don't handle NULL"

Definition at line 9 of file TryToGetDC.c.

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Function Documentation

HDC TryToGetDC

(

HWND

hWnd

)

Definition at line 11 of file TryToGetDC.c.

References MSG_ERROR20, MSG_ERROR36, MSG_ERROR37, and NULL.

{
        HDC hDCRet=NULL;

        if (hWnd)
        {
                hDCRet=GetDC(hWnd);
                if (hDCRet == NULL)
                {
#ifdef _DEBUG
                        MessageBox(NULL,MSG_ERROR36,MSG_ERROR20,MB_ICONWARNING);
#endif
                }
        }
        else
        {
#ifdef _DEBUG
                MessageBox(NULL,MSG_ERROR37,MSG_ERROR20,MB_ICONWARNING);
#endif
        }

        return (HDC)hDCRet;
}

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