C / C++ / MFC

'this is written in VB


Dim phBmp as long
Dim WorkDC as long

'WorkDC is the temp DC we use for the StretchBlt
'phBmp is the new resized bitmap
'IBmp is the BITMAPINFO of the old bitmap
'mvarhDC is the normal DC for our bitmap
'mvarhBmp is the old bitmap

'create the new DC
WorkDC = CreateCompatibleDC(hdc) 'assuming that hdc is a screen DC

'create the new bitmap
phBmp = CreateCompatibleBitmap(mvarhDC, mvarDocWidth, mvarDocHeight)

poldbmp = SelectObject(WorkDC, phBmp) 'select new bitmap into work DC

'copy the old bitmap to the new
StretchBlt WorkDC, 1, 1, IBmp.bmWidth, IBmp.bmHeight, mvarhDC, 1, 1,IBmp.bmWidth,IBmp.bmHeight, vbSrcCopy

SelectObject WorkDC, poldbmp 'put back old bitmap in work DC
SelectObject mvarhDC, phBmp   'select the new bitmap into our normal DC
DeleteObject mvarhBmp               'delete the old bitmap
DeleteDC WorkDC                        'destroy the temporary work DC

//this is written in C++ [:D]
<br>
HBITMAP phBmp;
HDC WorkDC;
//
//WorkDC is the temp DC we use for the StretchBlt
//phBmp is the new resized bitmap
//IBmp is the BITMAPINFO of the new bitmap
//mvarhDC is the normal DC for our bitmap
//mvarhBmp is the old bitmap
//Bmp  is the BITMAPINFO of the old bitmap
//
//create the new DC
WorkDC = CreateCompatibleDC(hdc);  //assuming that hdc is a screen DC
//
//create the new bitmap
phBmp = CreateCompatibleBitmap(mvarhDC, mvarDocWidth, mvarDocHeight);
//
poldbmp = SelectObject(WorkDC, phBmp);  //select new bitmap into work DC
//
//copy the old bitmap to the new
StretchBlt (WorkDC, 1, 1, IBmp->bmWidth, IBmp->bmHeight, mvarhDC, 1, 1,Bmp->bmWidth,Bmp->bmHeight, SRCCOPY);
//
SelectObject(WorkDC, poldbmp); //put back old bitmap in work DC
SelectObject(mvarhDC, phBmp);   //select the new bitmap into our normal DC
DeleteObject(mvarhBmp);               //delete the old bitmap
DeleteDC(WorkDC);                        //destroy the temporary work DC

//this will register Ctrl+Alt+M for the window hwnd
result=RegisterHotkey(
      hwnd,  //hwnd of the window to receive the WM_HOTKEY msg
      id,    //a hotkey id - can be anything but must be unique on this thread
      MOD_ALT || MOD_CONTROL, //the Alt/Ctrl/Shift modifiers
      VK_M //the keycode of the key to use
      );