Hi all.
We have a win32 application linked to Far Point's Spread32 library;
the application crashes when referencing a NULL pointer returned by
GlobalLock,
but obviously it runs perfectly under win98SE (see previous post about
GetWindowLongA) .
The behaviour of SCROLL_GetPtrScrollInfo, with nBar parameter = SB_CTL,
is to return wndPtr->wExtra as it were a pointer.
Actually we found that, in this case, the application stores in
wndPtr->wExtra[0] a handle;
so, tricking with wine's code, we obtained the pointer from the handle
(using GlobalLock),
making the app working (almost) correctly.
Before releasing a patch, we would like to hear some suggestion about it
(I mean: the current code isn't correct, but will all of others apps work
correctly after our fix?)
Our version of SCROLL_GetPtrScrollInfo looks like this:
[ controls/scroll.c ]:
126
/***********************************************************************
127 * SCROLL_GetPtrScrollInfo
128 */
129 static SCROLLBAR_INFO *SCROLL_GetPtrScrollInfo( WND* wndPtr, INT
nBar )
130 {
131 SCROLLBAR_INFO *infoPtr;
132 HGLOBAL hmem;
133 if (!wndPtr) return NULL;
134 switch(nBar)
135 {
136 case SB_HORZ: infoPtr = (SCROLLBAR_INFO
*)wndPtr->pHScroll; break;
137 case SB_VERT: infoPtr = (SCROLLBAR_INFO
*)wndPtr->pVScroll; break;
138 /* -- OLD VERSION -- case SB_CTL: infoPtr =
(SCROLLBAR_INFO *)wndPtr->wExtra; break; */
139 case SB_CTL:
140 hmem = (HGLOBAL) wndPtr->wExtra[0];
141 infoPtr = GlobalLock(hmem);
142 GlobalUnlock(hmem);
143 break;
Any help would be appreciated.
Thx
