failing RegisterClass

[Bajanine]

This is my first go at unicode and I thought I may as well do a little windows skeleton so I wouldn't have to keep recreating it. Well here is my attempt but It always gives me the message box "This program requires Windows NT"
What did I do incorrectly? I have been looking this over all evening and still can't find anything wrong with this. Hopefully it is something painfully obvious!
I'm using MSVC 2003 on XP Pro.

#define UNICODE
#define _UNICODE

#include <windows.h>

HINSTANCE hInstance;
HDC hdc;
PAINTSTRUCT ps;

LRESULT CALLBACK WndProc( HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR lpszCmdLine, int iCmdShow)
{
    static TCHAR szAppName[] = TEXT ("Win32Skeleton");
    HWND        hwnd;
    MSG            msg;
    WNDCLASS    wndclass;

    wndclass.style            = CS_HREDRAW | CS_VREDRAW;
    wndclass.lpfnWndProc    = WndProc;
    wndclass.cbClsExtra        = 0;
    wndclass.cbClsExtra        = 0;
    wndclass.hInstance        = hInstance;
    wndclass.hIcon            = LoadIcon (NULL, IDI_APPLICATION);
    wndclass.hCursor        = LoadCursor (NULL, IDC_CROSS);
    wndclass.hbrBackground    = (HBRUSH) GetStockObject (WHITE_BRUSH);
    wndclass.lpszMenuName    = NULL;
    wndclass.lpszClassName    = szAppName;

    if(!RegisterClass (&wndclass))
    {
        MessageBox(NULL, TEXT ("This program requires Windows NT!")
            , szAppName, MB_ICONERROR);
        return 0;
    }

    hwnd = CreateWindow(szAppName, TEXT ("SkeletonDoesn'tWork")
        , WS_OVERLAPPEDWINDOW
        , CW_USEDEFAULT, CW_USEDEFAULT
        , CW_USEDEFAULT, CW_USEDEFAULT
        , NULL, NULL, hInstance, NULL);

    ShowWindow(hwnd, iCmdShow);
    UpdateWindow(hwnd);

    while (GetMessage (&msg, NULL, 0, 0))
    {
        TranslateMessage (&msg);
        DispatchMessage (&msg);
    }
    return (int) msg.wParam;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch(message)
    {
    case WM_CREATE:
        return 0;
    }

    return DefWindowProc (hwnd, message, wParam, lParam);
}

[VirtualAce]

You should be able to set/unset unicode in your project properties. I think it's under the general category just above debugging.

Check your project properties as well to fix the other issue. I'm not sure why it's saying that right off hand.

[bithub]

Call GetLastError() to get more error information. This might lead you to the problem.

[Bajanine]

I set it up for UNICODE in my project options.

GetLastError:
RegisterClass failed with error 87 The parameter is incorrect

Thanks for your help but I still don't get it! How can the parameter be incorrect?

[Bajanine]

I fixed it by using:

ZeroMemory(&wndclass,sizeof(WNDCLASS));

Thanks for you help!

[Elysia]

It's always a good idea to zero out structs so you don't send junk data to APIs and functions.

[Joelito]

I always prefer this method:

WNDCLASS    wndclass = {0}; //No silly crt memset function