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o check for both CW_USEDEFAULT and CW_USEDEFAULT16. 

o if x is CW_USEDEFAULT (or CW_USEDEFAULT16) and y is *not*
  CW_USEDEFAULT (or CW_USEDEFAULT16) then use y as a second
  parameter to ShowWindow(). Some apps (CALC.EXE for Win98
  is one of them) use this undocumented feature to create
  hidden window with WS_VISIBLE style set.
This commit is contained in:
Slava Monich 1999-06-05 11:46:35 +00:00 committed by Alexandre Julliard
parent 6f456c2f02
commit a27807dca8
1 changed files with 26 additions and 4 deletions
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28
windows/win.c
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@ -662,6 +662,7 @@ BOOL WIN_CreateDesktopWindow(void)
static HWND WIN_CreateWindowEx( CREATESTRUCTA *cs, ATOM classAtom,
BOOL win32, BOOL unicode )
{
INT sw = SW_SHOW;
CLASS *classPtr;
WND *wndPtr;
HWND retvalue;
@ -714,9 +715,29 @@ static HWND WIN_CreateWindowEx( CREATESTRUCTA *cs, ATOM classAtom,
/* Fix the coordinates */
if (cs->x == CW_USEDEFAULT)
if (cs->x == CW_USEDEFAULT || cs->x == CW_USEDEFAULT16)
{
PDB *pdb = PROCESS_Current();
/* Never believe Microsoft's documentation... CreateWindowEx doc says
* that if an overlapped window is created with WS_VISIBLE style bit
* set and the x parameter is set to CW_USEDEFAULT, the system ignores
* the y parameter. However, disassembling NT implementation (WIN32K.SYS)
* reveals that
*
* 1) not only if checks for CW_USEDEFAULT but also for CW_USEDEFAULT16
* 2) it does not ignore the y parameter as the docs claim; instead, it
* uses it as second parameter to ShowWindow() unless y is either
* CW_USEDEFAULT or CW_USEDEFAULT16.
*
* The fact that we didn't do 2) caused bogus windows pop up when wine
* was running apps that were using this obscure feature. Example -
* calc.exe that comes with Win98 (only Win98, it's different from
* the one that comes with Win95 and NT)
*/
if (cs->y != CW_USEDEFAULT && cs->y != CW_USEDEFAULT16) sw = cs->y;
/* We have saved cs->y, now we can trash it */
if ( !(cs->style & (WS_CHILD | WS_POPUP))
&& (pdb->env_db->startup_info->dwFlags & STARTF_USEPOSITION) )
{
@ -729,7 +750,7 @@ static HWND WIN_CreateWindowEx( CREATESTRUCTA *cs, ATOM classAtom,
cs->y = 0;
}
}
if (cs->cx == CW_USEDEFAULT)
if (cs->cx == CW_USEDEFAULT || cs->cx == CW_USEDEFAULT16)
{
PDB *pdb = PROCESS_Current();
if ( !(cs->style & (WS_CHILD | WS_POPUP))
@ -780,6 +801,7 @@ static HWND WIN_CreateWindowEx( CREATESTRUCTA *cs, ATOM classAtom,
}
}
wndPtr->pDriver = wndPtr->parent->pDriver;
wndPtr->pDriver->pInitialize(wndPtr);
@ -982,7 +1004,7 @@ static HWND WIN_CreateWindowEx( CREATESTRUCTA *cs, ATOM classAtom,
}
}
if (cs->style & WS_VISIBLE) ShowWindow( hwnd, SW_SHOW );
if (cs->style & WS_VISIBLE) ShowWindow( hwnd, sw );
/* Call WH_SHELL hook */