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PODrawing a system-like cursor, top-most, anywhere
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  1. PODrawing a system-like cursor, top-most, anywhere
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    copied!<p>I need to draw a system-like cursor that I simply can control the position of. In other words, I need to draw a transparent image that looks just like the system cursor and I need it to be rendered on top of all other windows. I've tried multiple approaches, but they all seem to have some downside.</p> <p>I've figured out that I can load the cursor image by using LoadImage() and passing the resource OCR_NORMAL and casting it into a HBITMAP.</p> <pre><code>HICON NormalCursor = (HICON)LoadImage(NULL, MAKEINTRESOURCE(OCR_NORMAL), IMAGE_CURSOR, 0, 0, LR_DEFAULTSIZE | LR_SHARED); </code></pre> <p>Then getting the "desktop" HDC</p> <pre><code>hDC = GetDC(NULL); </code></pre> <p>Then I can try to draw it using DrawIconEx()</p> <pre><code>DrawIconEx(hDC, (int)x, 0, NormalCursor, 0, 0, NULL, NULL, DI_DEFAULTSIZE | DI_NORMAL); </code></pre> <p>The DI_NORMAL flag is supposed to combine the DI_IMAGE &amp; DI_MASK flags giving me a transparent image/icon/cursor, but this is my result on the desktop:</p> <p><a href="http://i55.tinypic.com/2v3q001.png" rel="nofollow noreferrer">Image</a></p> <p>Not to mention that if it moves it creates trails.</p> <p>By <strong>making a transparent window</strong> using SetLayeredWindowAttributes like this:</p> <pre><code>SetLayeredWindowAttributes(hWnd, RGB(0, 0, 0), 50, LWA_COLORKEY); </code></pre> <p>And having the background color of my window to be black, I can remove the background from the window. But due to doing alpha based on a color I get ugly black pixels around my cursor icon.</p> <p>Can I make the background of a window transparent in some other way than using a color mask?</p> <p>How do I draw a transparent cursor on top of all windows properly?</p>
 

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