C / C++ / MFC

// Resize png to 320x240 bmp
// The GDI+ Bitmap class is derived from the GDI+ Image class
// I've made no assumptions on the src image dimensions
//   You should use Image::GetHeight()/Image::GetWidth() in real life :)
 
   Gdiplus::Bitmap SrcBitmap(L"C:\\test.png", FALSE);
 
   Gdiplus::Bitmap DstBitmap(320, 240, SrcBitmap.GetPixelFormat()); 
 
   Graphics DstGraphics(&DstBitmap);
   DstGraphics.DrawImage(&SrcBitmap, 0, 0, 320, 240);
 
   CLSID bmpClsid;
   GetEncoderClsid(L"image/bmp", &bmpClsid);
 
   DstBitmap.Save(L"C:\\test.bmp", &bmpClsid, NULL);

// This utility ripped right from the SDK
 
int GetEncoderClsid(const WCHAR* format, CLSID* pClsid)
{
   UINT  num = 0;          // number of image encoders
   UINT  size = 0;         // size of the image encoder array in bytes
 
   ImageCodecInfo* pImageCodecInfo = NULL;
 
   GetImageEncodersSize(&num, &size);
   if(size == 0)
      return -1;  // Failure
  
   pImageCodecInfo = (ImageCodecInfo*)(malloc(size));
   if(pImageCodecInfo == NULL)
      return -1;  // Failure
 
   GetImageEncoders(num, size, pImageCodecInfo);
 
   for(UINT j = 0; j < num; ++j)
   {
      if( wcscmp(pImageCodecInfo[j].MimeType, format) == 0 )
      {
         *pClsid = pImageCodecInfo[j].Clsid;
         free(pImageCodecInfo);
         return j;  // Success
      }    
   }
 
   free(pImageCodecInfo);
   return -1;  // Failure
}

enum
{
  FEMALE = 1, //MALE: bit unset
  YOUNG  = 2, //OLD: bit unset
  ...
};

b=0x00000001;// bit 0 set
c=0x00000002;// bit 1 set
d=0x00000004;// bit 2 set
e=0x00000008;// bit 3 set
f=0x00000010;// bit 4 set

Sameer_Thakur wrote:

What is MFC? Offcource I know that is a collection of classes, structures etc, etc predefined by Microsoft

Sameer_Thakur wrote:

2. What is VC++? a language or a platforma or something else?
3. VC++ 6.0 or 5.0 (or whatever) is the IDE. Is that right?

Agbaria Ahmed wrote:

How to convert value to string in c?

PJ Arends wrote:

in the handler function use GetKeyState() to check if the control key is pressed.

if (wParam & MK_CONTROL)
{
//ctrl key is pressed
}

void CWnd::OnLButtonDblClk(UINT nFlags, CPoint point) 
{
	if  ( nFlags & MK_CONTROL)
	{
	//ctrl key is down
	}
	CWnd::OnLButtonDblClk(nFlags, point);
}