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[WIN32K:NTUSER] Handle IntGetSystemMenu failure cases. CORE-12180

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Thomas Faber 2018-03-03 11:10:37 +01:00
parent b7aa1e3122
commit 56fdb7adde
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GPG key ID: 076E7C3D44720826
1 changed files with 3 additions and 3 deletions
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6
win32ss/user/ntuser/nonclient.c
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@ -737,7 +737,7 @@ UserDrawCaptionButton(PWND pWnd, LPRECT Rect, DWORD Style, DWORD ExStyle, HDC hD
case DFCS_CAPTIONCLOSE:
{
PMENU pSysMenu = IntGetSystemMenu(pWnd, FALSE);
UINT MenuState = IntGetMenuState(UserHMGetHandle(pSysMenu), SC_CLOSE, MF_BYCOMMAND); /* in case of error MenuState==0xFFFFFFFF */
UINT MenuState = IntGetMenuState(pSysMenu ? UserHMGetHandle(pSysMenu) : NULL, SC_CLOSE, MF_BYCOMMAND); /* in case of error MenuState==0xFFFFFFFF */
/* A tool window has a smaller Close button */
if (ExStyle & WS_EX_TOOLWINDOW)
@ -1380,7 +1380,7 @@ NC_DoButton(PWND pWnd, WPARAM wParam, LPARAM lParam)
{
case HTCLOSE:
SysMenu = IntGetSystemMenu(pWnd, FALSE);
MenuState = IntGetMenuState(UserHMGetHandle(SysMenu), SC_CLOSE, MF_BYCOMMAND); /* in case of error MenuState==0xFFFFFFFF */
MenuState = IntGetMenuState(SysMenu ? UserHMGetHandle(SysMenu) : NULL, SC_CLOSE, MF_BYCOMMAND); /* in case of error MenuState==0xFFFFFFFF */
if (!(Style & WS_SYSMENU) || (MenuState & (MF_GRAYED|MF_DISABLED)) || (pWnd->style & CS_NOCLOSE))
return;
ButtonType = DFCS_CAPTIONCLOSE;
@ -1554,7 +1554,7 @@ NC_HandleNCLButtonDblClk(PWND pWnd, WPARAM wParam, LPARAM lParam)
case HTSYSMENU:
{
PMENU SysMenu = IntGetSystemMenu(pWnd, FALSE);
UINT state = IntGetMenuState(UserHMGetHandle(SysMenu), SC_CLOSE, MF_BYCOMMAND);
UINT state = IntGetMenuState(SysMenu ? UserHMGetHandle(SysMenu) : NULL, SC_CLOSE, MF_BYCOMMAND);
/* If the close item of the sysmenu is disabled or not present do nothing */
if ((state & (MF_DISABLED | MF_GRAYED)) || (state == 0xFFFFFFFF))