CreateWindowEx problem
BlitzPlus Forums/BlitzPlus Programming/CreateWindowEx problem
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| Anyone see what I’m doing wrong using CreateWindowEx with B+? This just crashes but ‘should’ create a listbox. Thanks a lot.
; .lib "User32.dll"
; api_CreateWindowEx% (dwExStyle%, lpClassName$, lpWindowName$, dwStyle%, x%, y%, nWidth%, nHeight%, hWndParent%, hMenu%, hInstance%, lpParam*) : "CreateWindowExA"
; api_GetActiveWindow% () : "GetActiveWindow"
AppTitle "test"
Const dwExStyle = 512
Const hMenu = 0;3
WS_CHILD = 16384 Shl 16
WS_GROUP = 2 Shl 16
WS_TABSTOP = 1 Shl 16
WS_VISIBLE = 4096 Shl 16
WS_VSCROLL = 32 Shl 16
LBS_USETABSTOPS = 128
xdwStyle = WS_CHILD Or WS_VISIBLE; Or WS_VSCROLL
dwStyle = xdwStyle
win=CreateWindow ("Win",10,10,800,600,main,11)
hWnd = api_GetActiveWindow()
api_CreateWindowEx (dwExStyle,"ListBox","test",dwStyle,10,10,200,200,hWnd,hMenu,0,0)
While WaitEvent(10)<>$803
Wend
End
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Hi Cold Harbour, your passing a bank on the lparam of createwindowex without creating one. also hInstance requires an handle to the module thats calling createwindowex.
; decls
;
.lib "kernel32.dll"
kernel32_GetModuleHandle%(lpModuleName%):"GetModuleHandleA"
.lib "user32.dll"
api_CreateWindowEx% (dwExStyle%, lpClassName$, lpWindowName$, dwStyle%, x%, y%, nWidth%, nHeight%, hWndParent%, hMenu%, hInstance%, lpParam%) : "CreateWindowExA"
api_GetActiveWindow% () : "GetActiveWindow"
; example
;
AppTitle "test"
Const dwExStyle = 512
Const WS_CHILD = $40000000
Const WS_VISIBLE = $10000000
win = CreateWindow ("Win",10,10,800,600,0,11)
hWnd = QueryObject(win,1);api_GetActiveWindow()
listbox = api_CreateWindowEx(dwExStyle,"LISTBOX","test",WS_CHILD Or WS_VISIBLE,10,10,200,200,hWnd,0,kernel32_GetModuleHandle(0),0)
Repeat
If WaitEvent()=$803 Then Exit
Forever
End
kev |
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| Thanks a lot Kev! :) |
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