gdi

I know that GDI handles are unique and process specific in 'Big Windows' but do they work the same way in Windows CE 6.0? For example: I've got a font management service that several other services and applications will be using. This service has a list of valid fonts and configurations for printing and displaying; CreateFontIndirect() has been called on each of them. When one of these client applications requests a particular font (and configuration), can I return it the appropriate HFONT? If not, is there a safe/valid way to duplicate the handle, ala DuplicateHandle for Kernel handles. The

I want to find all windows which entirely or partly overlap my window (are on top of it). As a special case, if I have two window handles (hWnd1 and hWnd2), I want to find if hWnd2 partly or completely overlaps hWnd1. The windows in question are desktop windows (not children/siblings in the same process). Iterate the windows that might overlap yours by repeatedly calling GetWindow(), using GW_HWNDPREV. Use GetWindowRect() to check if such a window actually overlap yours. There's no shortcut for two known windows, just check if GetWindow() returns hWnd2 while iterating. 来源： https:/

I'm having a tough time wrapping my head around how to figure out the math for cropping any image that has a higher aspect ratio than 4:3 to 4:3. For example, I may have some images that are 16:9 that I I want resized and then cropped to 4:3. The resize bit I already have working, but it's maintaining the same aspect ratio. I know I need to use Graphics.DrawImage() But I'm not entirely sure what the parameters should be nor how I derive those parameters. Here's what I do know: var dimension = (double)bigSide/smallSide if(dimension > 1.4) { Graphics.DrawImage(resImage, new Rectangle(?, ?, ?, ?)

I'm trying to use the method described here to use a QPainter and GDI calls on the same widget. Unfortunately this tutorial seem to have been written on an earlier version of Qt and now it does not work. I set the WA_PaintOnScreen flag and reimplement paintEngine() to return NULL. Then on the paintEvent() I create a QPainter, use it and then use some GDI calls to paint a bitmap. The GDI calls work fine but the QPainter does nothing. I get the following error on the console: QPainter::begin: Paint device returned engine == 0, type: 1 Is this simply not supported anymore? how can I do it? I've

So, I am working on a text editor. I use double buffering to paint on to the screen. So basically I have an offscreen bitmap, which I paint on, and then copy it to the screen. Now, when the window for the text editor resizes, I need to resize the offscreen bitmap as well. So what would be a good way to resize the bitmap? I was thinking to maybe delete the old object and create a new bitmap using CreateCompatibleBitmap , but I'm wondering if it's the correct way to do it. Language : C++ using Win32 API Using CreateCompatibleBitmap will work, and then you'll want to call BitBlt on it to copy the