why is this failing? .386 locals jumps .model flat,STDCALL extrn ExitProcess : Proc extrn CreateWindowExA : Proc extrn GetModuleHandleA : Proc extrn MessageBoxA : Proc CW_USEDEFAULT EQU 8000h WS_OVERLAPPEDWINDOW = WS_OVERLAPPED + WS_CAPTION + WS_SYSMENU + WS_THICKFRAME + WS_MINIMIZEBOX + WS_MAXIMIZEBOX WS_OVERLAPPED = 00000h WS_CAPTION = 000C0h WS_SYSMENU = 00008h WS_THICKFRAME = 00004h WS_MINIMIZEBOX = 00002h WS_MAXIMIZEBOX = 00001h .data ClassName db "SimpleWinClass",0 AppName db "Our First Window",0 hInstance dd ? caption db "error!!!!!!!!!!!!!",0h text db "SOMETHING FAILED!",0h .code Start: push 0 call GetModuleHandleA mov hInstance,eax push 0 push hInstance push 0 push 0 push CW_USEDEFAULT push CW_USEDEFAULT push CW_USEDEFAULT push CW_USEDEFAULT push WS_OVERLAPPEDWINDOW push offset AppName push offset ClassName push 0 call CreateWindowExA .if eax==0 push 00h push offset caption push offset text push 0 call MessageBoxA .else push 0 call ExitProcess .endif End Start
CreateWindowEx creates a window based on a window class. But in your program, you only specified a name for a window class, but you haven't defined it. Standard window classes like BUTTON or EDIT, are defined by windows. But your own windows should be defined by yourself. Use RegisterClassEx to register your window classes (Iczelion has a tutorial on how to do it). Thomas This message was edited by Thomas, on 4/18/2001 3:09:51 PM
ok... thanks... i changed it to this ClassName db "EDIT",0 thats an edit box that kinda looks like notepad right? anyway, it compiles and when i run it; it just does nothing. ie. the function doesnt fail and it reaches the end of the prog. whats going on now???
Edit can not be main window. It must be child. Edit is not like NotePad. NotPad is main window (dialog or some own) and edit window on it. The Svin.
Maybe next you will want to make a "message loop" ? :) and to anticipate a alittle then you will need a windows "CallBack" procedure to deal with windows messages...and exit the message loop AFTER a WM_Quit message was received...and... Now please ...have you read the Iczelions tutorials...because you will find the skeleton of a win32 program there...Also a little reading of Petzold's books ("Programming Windows") will help... :)