nanogui: Using create structures.
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
