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Source code

m_pmOffscreen	 = new QPixmap(550, 400);
m_bmpOffscreen 	= (HBITMAP) m_pmOffscreen->toWinHBITMAP();
m_dcOffscreen 	  = CreateCompatibleDC( GetDC(NULL) );
HGDIOBJ hPrevSel= SelectObject( m_dcOffscreen,  m_bmpOffscreen ); 

//------------ check the size of the returned bitmap
//------------ PROBLEM 1: returns {0,0} in dimension,
//------------ where { 550, 400 } is expected.
SIZE dimension = {0,0};	
bool bBDE = GetBitmapDimensionEx( m_bmpOffscreen, &dimension ); 
	
//------------ results in a green background, as expected.
m_pmOffscreen->fill( 0x00FF00 );
	
//------------ PROBLEM 2: text doesn't end up in the pixmap:
QString hello = "hello world!";
bool bResult = TextOut
		( m_dcOffscreen
		, 100, 100
		, hello.toStdWString().data()
		, 12
		);