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| Subject:
Using create structures.
From: Chris Johns ####@####.#### Date: 18 Jan 2000 04:32:11 -0000 Message-Id: <3883EA59.355F9324@acm.org> Hi,
In `CreateWindowEx' the CREATESTRUCT is made a parameter with the
following code :
/* note: the following assignment may have to change
* if the WINAPI decl changes from cdecl
*/
lpcs = (LPCREATESTRUCT)&dwExStyle; <<<<<<<<<<<
if(SendMessage(wp, WM_CREATE, 0, (LPARAM)(LPSTR)lpcs) == -1) {
WndDestroyWindow(wp, FALSE);
return NULL;
}
Should this be :
/* note: the following assignment may have to change
* if the WINAPI decl changes from cdecl
*/
lpcs = (LPCREATESTRUCT) dwExStyle;
if(SendMessage(wp, WM_CREATE, 0, (LPARAM)(LPSTR)lpcs) == -1) {
WndDestroyWindow(wp, FALSE);
return NULL;
}
--
Chris Johns, ####@####.####
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| Subject:
RE: Using create structures.
From: Greg Haerr ####@####.#### Date: 18 Jan 2000 17:16:34 -0000 Message-Id: <C1962B36D9BBD311B0F80060083DFEFB0412D7@SYS.CenSoft.COM> On Monday, January 17, 2000 9:22 PM, Chris Johns wrote:
: Hi,
:
: In `CreateWindowEx' the CREATESTRUCT is made a parameter with the
: following code :
:
: /* note: the following assignment may have to change
: * if the WINAPI decl changes from cdecl
: */
: lpcs = (LPCREATESTRUCT)&dwExStyle; <<<<<<<<<<<
: if(SendMessage(wp, WM_CREATE, 0, (LPARAM)(LPSTR)lpcs) == -1) {
: WndDestroyWindow(wp, FALSE);
: return NULL;
: }
:
: Should this be :
:
: /* note: the following assignment may have to change
: * if the WINAPI decl changes from cdecl
: */
: lpcs = (LPCREATESTRUCT) dwExStyle;
: if(SendMessage(wp, WM_CREATE, 0, (LPARAM)(LPSTR)lpcs) == -1) {
: WndDestroyWindow(wp, FALSE);
: return NULL;
: }
No. The first above is tricky code that takes the address of a stack
parameter and uses it as the address of a structure that includes
all those parameters. Check out the CREATESTRUCT definition.
Greg
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