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ScrollDC From my notes 08/16/2003:

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- Wine testing was not enough. If dx & dy are zero and hrgn and lprc are used or not zero. The Rect for hrgn and lprc are set zero w/o NtUserScrollDC being called. It just returns TRUE.
- If HDC is zero it will return FALSE and not call NtUserScrollDC.

svn path=/trunk/; revision=29893
This commit is contained in:
James Tabor 2007-10-26 02:07:33 +00:00
parent 5d397e4214
commit e40b261ed9
1 changed files with 10 additions and 0 deletions
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10
reactos/dll/win32/user32/windows/paint.c
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@ -185,6 +185,16 @@ BOOL STDCALL
ScrollDC(HDC hDC, int dx, int dy, CONST RECT *lprcScroll, CONST RECT *lprcClip, ScrollDC(HDC hDC, int dx, int dy, CONST RECT *lprcScroll, CONST RECT *lprcClip,
HRGN hrgnUpdate, LPRECT lprcUpdate) HRGN hrgnUpdate, LPRECT lprcUpdate)
{ {
if (hDC == NULL) return FALSE;
if (dx == 0 && dy == 0)
{
if (hrgnUpdate) SetRectRgn(hrgnUpdate, 0, 0, 0, 0);
if (lprcUpdate) lprcUpdate->left = lprcUpdate->right =
lprcUpdate->top = lprcUpdate->bottom = 0;
return TRUE;
}
return NtUserScrollDC(hDC, dx, dy, lprcScroll, lprcClip, hrgnUpdate, return NtUserScrollDC(hDC, dx, dy, lprcScroll, lprcClip, hrgnUpdate,
lprcUpdate); lprcUpdate);
} }