Hi All,

In my application I want to create an image of a document window as a preview prior to displaying the window to the user. To obtain the CGImage of a displayed window is simple enough using the CGWindow API as shown below:

- (CGImageRef)CGImage;
{
return CGWindowListCreateImage(CGRectNull, kCGWindowListOptionIncludingWindow, [self windowNumber], kCGWindowImageDefault);
}

The problem comes when trying to display the window initially at a far- off position so I can create the image and the move the window onto the screen.

Setting the origin of the window to a point with large +ve or -ve ordinates causes the window to appear at the edge of the main screen, partly shown.

Has anybody any experience with either a) rendering an entire window into a bitmap instead of to the screen, or b) moving the window offscreen completely? If b) is possible, would the above code work for such a window?

Thanks for your help,

Jonathan

http://espresso-served-here.com
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