I just got Visual Studio 2005 and I tried to make a program using Win32. The program is just displaying a window. When I compile the code I get no errors at all, but nothing happens after that. My window doesn't pop up. I made sure that I had the functions: ShowWindow() and UpdateWindow, but apparently that wasn't the problem. Please help.
Problem seeing my window
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Problem seeing my window
dzeaman
Could you show your CreateWindow code
Mithun.Pentuker
Not just with Visual Studio. Any window (including child controls) needs the WS_VISIBLE style to be visible on screen. Some APIs may abstract this away into a SetVisible method or a Visible property, but the underlying code will use WS_VISIBLE on the windows.
Marcelo Ferrer
I tried to put the WS_VISIBLE in like this: CreateWindowEx(NULL, "Windows Class", "TITLE", WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, hinstance, NULL);
That didn't work...I also tried to put SW_SHOW in like this: ShowWindow(hwnd,SW_SHOW);
That didn't work either. I tried both seperately, and together. Any other suggestions, or did I implement the suggestions incorrectly
esgibson
Not to try and argue, but I've never needed to do that before, and I've gotten plenty of windows to work.
Where do I put this, because I've never used it before
Davy de Kerf
error C3861: '_T': identifier not found
theczar
How do I do that
I have never had to do that before. Is that something that you have to do with visual studio only
tongueless
I believe the WS_VISIBLE style dates back to the Win16 days. Anyway, you need to pass that as a style to the CreateWindowEx call.
Alternatively, you could do a ShowWindow with SW_SHOW - perhaps that explains why you never had to use the WS_VISIBLE style before. Because you'd call ShowWindow later on.
Stuart Taylor
Nick
You know what I think it would be best for you to use the wizard to generate a Win32 project, and take a look at the code. The default code will create and show a window on screen. Looks to me that, that's exactly what you are trying to do, but you've missed out something somewhere.
cchau
I used:
while(1)
{
if(PeekMessage(&msg,NULL,0,0,PM_REMOVE))
{
if(msg.message == WM_QUIT)
break;
TranslateMessage(&msg);
DispatchMessage(&msg);
}
else
{
}
}
ANDY_DANDY
Most of the stuff in the generated project doesn't look the same as I am used to. I can't understand most of it. I have had a lot of problems with the switch from 2003 to 2005, and that might have something to do with it. The only code that I have written that works in 2005, works because it is converted when I open it with 2005. But it doesn't change the code, so I don't know what has been changed in it.
One big problem that I ran into was I got this error when I compiled my code:
error C2440: '=' : cannot convert from 'const char [14]' to 'LPCWSTR'
This error was at the places where I typed "Windows Class" and the title of my window. I fixed this by putting global variables as follows:
TCHAR szWindowClass[100];
TCHAR szTitle[100];
But, I can't figure out how to fix that problem when I try to display a bitmap or something because the same error message pops up at the name of my bitmap.
Would any of this effect why I can't see my window
Karel Kruizenruiker
You need to specify the WS_VISIBLE style.
Donaldinho
Well, it's really impossible to comment without seeing the code...
Have you set up a message loop such as this one
while (GetMessage (&msg, NULL, 0, 0)){
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
Guddy
Here is my CreateWindow code:
hwnd = CreateWindowEx(NULL,"Windows Class","TITLE",
WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,
CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,hinstance,NULL);
graham forbes
For string literals, use _T("...")
So if you had "abc.bmp", it should be modified to _T("abc.bmp")
That will automatically map it to an Ansi string for a non-Unicode build, and a wide string for a Unicode build.
Note that VC 2005, by default, generates projects as Unicode.