Resize bitmap from Clipborad?

[JoneLe86]

What I am up to is resizing the bitmap from the clipboard then re send it to clipborad so it's kinda easy in VB take a look

Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
My.Computer.Clipboard.SetImage(New Bitmap(bmp, CInt(bmp.Width / 2), CInt(bmp.Height / 2))) ' resized and pasted to Excel
End Sub

No how to do this under C? So i can send the bitmap to the clipboard with these instructions

OpenClipboard(NULL);
EmptyClipboard();
SetClipboardData(CF_BITMAP, Hbitmap);
CloseClipboard();
OpenClipboard(NULL);

and for bringing it

HBITMAP hbitmap = (HBITMAP)getclipboardData(CF_BITMAP)

and i know that I should use

StretchBlt()

but i do not know how to accomplice that?

[thanh_bkhn]

Assume you have a HBITMAP hbitmap which already contains your clipboard data. Then you can StretchBlt that data to a destination HDC hdc as below: 1. Create a compatible HDC in memory with your destination hdc

HDC memDC= CreateCompatibleDC(hdc);

2. Select your hbitmap into the memory DC

HBITMAP hOldBmp = (HBITMAP)SelectObject(memDC, hbitmap);

3. Use StretchBlt to resize it

StretchBlt(hdc, 0, 0, new_Width, new_Height, memDC, 0, 0, org_Width, org_Height, SRCCOPY);

4. Restore the old bitmap and free memory

SelectObject(memDC, hOldBmp);
DeleteDC(memDC);

Hope it helps :)

[Jochen Arndt]

You may use the CopyImage()[^] function:

BITMAP bm;
GetObject(hBitmap, sizeof(bm), &bm);
HBITMAP hCopy = (HBITMAP)CopyImage(hBitmap, IMAGE_BITMAP,
bm.bmWidth / 2, bm.bmHeight / 2,
LR_COPYDELETEORG);
SetClipboardData(CF_BITMAP, hCopy);

[JoneLe86]

Thanks it helped me :)

[JoneLe86]

Thanks I did not know that! :-D gonna check that out