Help! Can't draw GDIplus bitmap from HBITMAP

[indiocolifa]

My problem is that I want to draw some ownerdrawn controls on a GDI+ graphics surface.

My approach is:

1. I've declared a global object as:


extern Gdiplus::Bitmap *pBmpOdElem;


2. I setup an empty bitmap with:


void createGdiplusObj(void)
{
pBmpOdElem = new Bitmap(50,50,PixelFormatDontCare);
}


3. I try to draw onto the bitmap using the pBmpOdElem pointer:


BOOL OwnDrawProc (WPARAM wparam, LPARAM lparam)
{
HBITMAP hBitmap = 0;
LPDRAWITEMSTRUCT lpDrawItem = (LPDRAWITEMSTRUCT)lparam;
int x = lpDrawItem->rcItem.top;
int y = lpDrawItem->rcItem.left;
Graphics gr(lpDrawItem->hDC);
UINT uiSelect = lpDrawItem->itemState & ODS_SELECTED;

...

pBmpOdElem->FromHBITMAP(hBitmap, NULL);
gr.DrawImage (pBmpOdElem, x, y, pBmpOdElem->GetWidth(), pBmpOdElem->GetHeight());
}


and nothings happens...

My previous approach to the problem was creating a Bitmap object in the ownerdrawn procedure and draw it accordingly. This worked but I dont want to create a Bitmap object every time the painting routine gets called... it's not efficient.

Any help with managing those GDI+ ptrs?

thank you.

Hernan

[indiocolifa]

don't care...

I fixed it with the following line


gr.DrawImage (pBmpOdElem->FromHBITMAP(hBitmap,0), x, y, pBmpOdElem->GetWidth(), pBmpOdElem->GetHeight());