casting comptime known int to *opaque{} | Zig Programming Language | Page 1

graceful remnant Mar 9, 2026, 5:05 PM

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im trying to achieve the last argument
FillRect(hdc, &ps.rcPaint, (HBRUSH) (COLOR_WINDOW+1));

grave remnant Mar 9, 2026, 5:55 PM

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What is exactly your problem? I don't have an example of exactly this situation but here's a similar one: https://github.com/vadim-za/zt4i-libs/blob/main/gui/win32/window/class.zig#L97
Does this answer your question (which you didn't explicitly ask)?

graceful remnant Mar 9, 2026, 6:03 PM

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I'm sorry that i didn't explicitly ask the question but what i was really wondering about is since built in functions return *anyopaque but externed windows functions require pointer to opaque{} would it still work

grave remnant Mar 9, 2026, 6:14 PM

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I'm still not sure what the question is. You said yourself, the argument is a comptime int. The formal argument type is whatever you declare FillRect to or whatever the library you're using is declaring it to (I don't think there is a standard). So what is exactly your situation?

#casting comptime known int to *opaque{}