C / C++ / MFC

unsigned char BIHeadMem[sizeof(BITMAPINFO) + 16 * sizeof(RGBQUAD)] = {0};
BITMAPINFO &BIHead = *(BITMAPINFO *)BIHeadMem;

BIHead.bmiHeader.biSize           = sizeof(BIHead.bmiHeader);
BIHead.bmiHeader.biBitCount       = 4;
BIHead.bmiHeader.biClrImportant   = 0;
BIHead.bmiHeader.biClrUsed        = 0;
BIHead.bmiHeader.biCompression    = BI_RGB;
BIHead.bmiHeader.biSizeImage      = 0;
BIHead.bmiHeader.biXPelsPerMeter  = 0;
BIHead.bmiHeader.biYPelsPerMeter  = 0;
BIHead.bmiHeader.biWidth          = 32;
BIHead.bmiHeader.biHeight         = -32;
BIHead.bmiHeader.biPlanes         = 1;

for (int I = 0; I < 16; I++)
{
  BIHead.bmiColors[I].rgbRed      = BIHead.bmiColors[I].rgbBlue = BIHead.bmiColors[I].rgbGreen = (BYTE)I;
  BIHead.bmiColors[I].rgbReserved = 0;
}

void *DummyPixels;
CBitmap bmp;
bmp.Attach(CreateDIBSection(NULL, &BIHead, DIB_RGB_COLORS, &DummyPixels, NULL, 0)); //The creation succeeds...

CDC memDC;
memDC.CreateCompatibleDC(NULL);  //Creation succeeds...
memDC.SelectObject(&bmp); //SelectObject succeeds...

//Here i also tried creating a LOGPALETTE from the DIB's pal, making a CPalette from that and select it for memDC
//with CDC::SelectPalette (and CDC::RealizePalette) but this seems to make no difference whatsoever

memDC.FillSolidRect(0, 0, fSizeCache.WellSize, fSizeCache.WellSize, RGB(0, 0, 0)); //Success

CPen    pen;
CBrush  brush(RGB(2, 2, 2));

pen.CreatePen(PS_SOLID, 1, RGB(1, 1, 1));
memDC.SelectObject(&brush);
memDC.SelectObject(&pen);
memDC.Ellipse(0, 0, 32, 32); //Success...