C / C++ / MFC

5 Dynamic_casts (_expr.dynamic.cast_) can be used during construction or
  destruction (_class.base.init_). When a dynamic_cast is used in a con-
  structor  (including from the mem-initializer for a data member) or in
  a destructor, or used in a function called  (directly  or  indirectly)
  from  a  constructor or destructor, if the operand of the dynamic_cast
  refers to the object under construction or destruction, this object is
  considered  to  be a most derived object that has the type of the con-
  structor or destructor's class.  If the operand  of  the  dynamic_cast
  refers  to the object under construction or destruction and the static
  type of the operand is not a pointer to or object of  the  constructor
  or  destructor's  own  class  or  one  of  its bases, the dynamic_cast
  results in undefined behavior.

<br />
// get your bitmap (assuming addressable by handle hBmp)<br />
BITMAP bm;<br />
GetObject(hBmp, sizeof(BITMAP), &bm);<br />
		<br />
// prepare the bitmapinfo structure<br />
BITMAPINFO bmInfo;<br />
memset(&bmInfo.bmiHeader, 0, sizeof(BITMAPINFOHEADER));<br />
bmInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);<br />
bmInfo.bmiHeader.biWidth = bm.bmWidth;<br />
bmInfo.bmiHeader.biHeight = bm.bmHeight;<br />
bmInfo.bmiHeader.biPlanes = 1;<br />
bmInfo.bmiHeader.biBitCount = 24;<br />
<br />
// Create temporary DC<br />
HDC TmpDC = CreateCompatibleDC(NULL);<br />
<br />
// Create a temp bitmap and select it into the MemDC<br />
BYTE *pbase;<br />
HBITMAP TmpBmp = CreateDIBSection(TmpDC &bmInfo, DIB_RGB_COLORS, (void**)&pbase, 0, 0);<br />
<br />
// Select the object<br />
HGDIOBJ TmpObj = SelectObject(TmpDC, TmpBmp);<br />
<br />
// Draw the background<br />
HDC dcBmp = CreateCompatibleDC(TmpDC);<br />
SelectObject(dcBmp, hBmp);<br />
<br />
// Draw it as a background<br />
BitBlt(TmpDC, 0, 0, bm.bmWidth, bm.bmHeight, dcBmp, 0, 0, SRCCOPY);<br />
<br />
// Blt whatever you want to the destination DC, namely TmpDC...<br />
// Do your drawing here....<br />
<br />
// Drawing stuff........<br />
<br />
//dispose of when done...<br />
DeleteDC(dcBmp);<br />
<br />
// Clean up<br />
DeleteObject(hBmp);<br />
hBmp = TmpBmp;<br />
SelectObject(TmpDC, TmpObj);<br />
DeleteDC(TmpDC);<br />

#define ID_MYITEM  5000