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• 00:56, 9 April 2025 Martini talk contribs created page WinQueryUpdateRegion (Created page with "This call ''obtains an update region of a window''. ==Syntax== WinQueryUpdateRegion(hwnd, hrgn) ==Parameters== ;hwnd (HWND) - Input: Handle of the window whose update region is to be queried. ;hrgn (HRGN) - Input: Handle of the region where the window's update region (in window coordinates) will be copied. ==Returns== ;lComplexity (LONG) - returns :Complexity of resulting region/error indicator. :;RGN_NULL ::Null region. :;RGN_RECT ::Rectangular region. :;RGN...")