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Tip of the Day
Language: C
Expertise: Intermediate
Dec 29, 2003

WEBINAR:

On-Demand

Application Security Testing: An Integral Part of DevOps


Use GDI to Draw on Top of Other Windows

Have you ever wanted to draw or write something on top of another window using GDI? It can be done by obtainig a DC to the desktop window and then using normal drawing functions on it. For example:

HDC hDC;

hDC = CreateDC("DISPLAY", NULL, NULL, NULL);
if (hDC) {
    TextOut(hDC, 0, 0, "Hello world!", 12);
    DeleteDC(hDC);
}
This will write 'Hello world!' in the upper left corner of your screen.
Paul Marinescu
 
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