C / C++ / MFC

void BitmapResourceToFile(int resourceId, CString dirToWriteTo)
{
  HRSRC resourceInfo;
  HGLOBAL loadedResourceHandle;
  HINSTANCE instanceHandle;
  BITMAPFILEHEADER bitmapFileHeader;
  LPBITMAPINFOHEADER bitmapInfo;
  UINT bitsPerPixel;
  UINT numberOfPixelBytes;
  UINT extra;
  CStdioFile file;

  instanceHandle = ::AfxGetInstanceHandle();
  resourceInfo = ::FindResource(instanceHandle,MAKEINTRESOURCE(resourceId),RT_BITMAP);
  loadedResourceHandle = ::LoadResource(instanceHandle,resourceInfo);
  bitmapInfo = (LPBITMAPINFOHEADER)::LockResource(loadedResourceHandle);
  numberOfPixelBytes = (lpBitmapInfo->biWidth * lpBitmapInfo->biBitCount)/8;
	
  extra = numberOfPixelBytes % 4;
  if(extra != 0 && extra != 4)
  {
    //Number of bytes is not in a multiple of 4
    numberOfPixelBytes += extra;
  }<br>

  numberOfPixelBytes *= bitmapInfo->biHeight;
  bitmapFileHeader.bfType = 0x4d42;
  bitsPerPixel = 1 << bitmapInfo->biBitCount;
  bitmapFileHeader.bfSize = (DWORD)(sizeof(bitmapFileHeader) + sizeof(bitmapInfo) + numberOfPixelBytes + bitsPerPixel);
  bitmapFileHeader.bfReserved1 = 0;
  bitmapFileHeader.bfReserved2 = 0;
  bitmapFileHeader.bfOffBits = sizeof(bitmapFileHeader) + sizeof(bitmapInfo);

  file.Open(resourceFileDir,CFile::modeCreate | CFile::modeWrite);
  file.Write(&bitmapFileHeader,sizeof(bitmapFileHeader));
  file.Close();
  file.Open(resourceFileDir,CFile::modeNoTruncate | CFile::modeWrite);
  file.Write(bitmapInfo,sizeof(bitmapInfo) + numberOfPixelBytes + bitsPerPixel);
  file.Close();
}

<br />
#include <windows.h><br />
<br />
/*  Declare Windows procedure  */<br />
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);<br />
<br />
/* debug function  */<br />
void debug(LPSTR t);<br />
<br />
int WINAPI WinMain (HINSTANCE hThisInstance,<br />
                    HINSTANCE hPrevInstance,<br />
                    LPSTR lpszArgument,<br />
                    int nFunsterStil)<br />
<br />
{                  <br />
    debug("This is a test\n");  <br />
    //...             <br />
    //purposely omitted<br />
    //...<br />
     debug("End Program");<br />
     return messages.wParam;<br />
   <br />
}<br />
<br />
<br />
/*  This function is called by the Windows function DispatchMessage()  */<br />
<br />
LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)<br />
{<br />
    //Message handling code - purposefully omitted<br />
    return 0;<br />
}<br />
<br />
void debug(LPSTR t)<br />
{<br />
    DWORD d; <br />
    HANDLE h;<br />
    LONG k=0;<br />
    if ( (h = CreateFile("log.txt", GENERIC_WRITE, 0, 0, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL,0) ) )    <br />
    {<br />
        //MessageBox(0,"File is opened for writing","File opened",MB_OK | MB_ICONINFORMATION);<br />
        SetFilePointer(h,0,&k,FILE_END);<br />
        //SetFilePosition(h, 0, 0, FILE_END);<br />
        //SetEndOfFile(h);<br />
        if ( ! WriteFile(h, t, strlen(t), &d, NULL) )<br />
            MessageBox(0,"Write failure","Status", MB_OK | MB_ICONERROR);          <br />
    }      <br />
    else<br />
        MessageBox(0, "Opening failure", "Status", MB_OK | MB_ICONERROR);<br />
        <br />
    CloseHandle(h);    <br />
}<br />

<br />
This is a test¤End Program<br />

<br />
This is a test<br/>End Program<br />
<br />