BUG: SelectClipRgn() Does Not Update Properly on Printer (104963)
The information in this article applies to:
- Microsoft Windows Software Development Kit (SDK) 3.1
This article was previously published under Q104963
3.10
WINDOWS
kbprg kbbuglist
SYMPTOMS
In a Windows 3.1 printing application, calling SelectClipRgn() with the second parameter set to NULL to reset the clipping region to clip output to the printer page does not reset the clipping region. Clipping on the printer device context is still set to the clipping region specified in the previous call to SelectClipRgn().
CAUSE
The HP LaserJet II and HP LaserJet III printer drivers do not handle the
call to SelectClipRgn() properly when the hrgn parameter is set to NULL. Instead of setting the clipping region to be the entire printable page (as it should), the call has no effect and the previous clipping region is still the device context's clipping region.
RESOLUTION
Instead of sending NULL as the hrgn parameter to SelectClipRgn(), create a region of the printable area of the page and send that region as the hrgn parameter. This will give the desired effect of calling
SelectClipRgn(hPrnDC, NULL). The following is an example of how this
workaround could be implemented:
HRGN hRgn,hPageRgn;
POINT pt;
SelectClipRgn(hPrnDC,hRgn=CreateRectRgn(200,200,500,500));
// . . .
// SelectClipRgn(hPrnDC,NULL);
// Instead of calling the above function, try this:
pt.x=GetDeviceCaps(hPrnDC,HORZRES);
pt.y=GetDeviceCaps(hPrnDC,VERTRES);
SelectClipRgn(hPrnDC,hPageRgn=CreateRectRgn(0,0,pt.x,pt.y));
DeleteObject(hRgn);
DeleteObject(hPageRgn);
STATUSMicrosoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.
| Modification Type: | Minor | Last Reviewed: | 3/7/2005 |
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| Keywords: | kbbug kbpending KB104963 |
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