How to create pattern brush using PNG image.

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MFC

VC++

I have image with black dots in a white background, which i use to create a patten brush and change the color of the black dots using SetTextColor. I created a CBitmap using PNG image(i used CPngImage to get HBITMAP and attached it to CBitmap ). Now i created PatternBrush using(CreatePatternBrush) with that bitmap, the problem is that the color of the brush doesn't change if i use PNG image. But it changes when i use image in bmp format.

What I have tried:

here is some code
CBitmap bmp;
if (bmp.LoadBitmap(IDB_BITMAP1))
{
if (brush.CreatePatternBrush(&bmp))
pOldBrush = pDC->SelectObject(&brush);
}

pDC->SetTextColor(color); This Works

CBitmap bmp;
CPngImage pngImage;
HBITMAP hBitmap = NULL;

if ( pngImage.Load(MAKEINTRESOURCE(nIDResource)) )
{
hBitmap = (HBITMAP)pngImage.Detach();
}


if ( hBitmap )
bmp.Attach(hBitmap);

if (brush.CreatePatternBrush(&bmp))
pOldBrush = pDC->SelectObject(&brush);

pDC->SetTextColor(color); This Doesn't work