Win32: No Window Appears - windows

Question

I was programming the example code from Frank Luna's book "Introduction to 3D Game Programming with DirectX 10". The code is the first Win32 example in the Appendix A: Windows Programming section.
Right now, the program compiles under both VC++ 2008/2010, but no window appears, although the debug session has started and I have to forcefully close it. I have no idea where it is, I'm not using Win32 Console mode, I have closed all other windows and no other IDE or session of VC++ is running.
Any idea why this might be happening?
PS: I have also checked my Processes. It is indeed running.
#include <Windows.h>
HWND ghMainWnd = 0;
bool InitWindowsApp(HINSTANCE instanceHandle, int show);
int Run();
LRESULT CALLBACK
WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
int WINAPI
WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR pCmdLine, int nShowCmd )
{
if( !InitWindowsApp(hInstance, nShowCmd) )
return 0;
return Run();
}
bool InitWindowsApp( HINSTANCE instanceHandle, int show )
{
WNDCLASS wc;
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = instanceHandle;
wc.hIcon = LoadIcon(0, IDI_APPLICATION);
wc.hCursor = LoadCursor(0, IDC_ARROW );
wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wc.lpszMenuName = 0;
wc.lpszClassName = L"BasicWndClass";
if( !RegisterClass(&wc) )
{
MessageBox(0, L"RegisterClass FAILED", 0, 0);
return false;
}
ghMainWnd = CreateWindow(
L"BasicWndClass",
L"Win32Basic",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
0,
0,
instanceHandle,
0);
if( ghMainWnd = 0 )
{
MessageBox( 0, L"Window Creation FAILED", 0, 0 );
return false;
}
ShowWindow( ghMainWnd, show );
UpdateWindow( ghMainWnd );
return true;
}
int Run()
{
MSG msg = {0};
BOOL bRet = 1;
while( bRet = GetMessage( &msg, 0, 0, 0 ) != 0 )
{
if( bRet == -1 )
{
MessageBox( 0, L"GetMessage FAILED", 0, 0 );
break;
}
else
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return (int)msg.wParam;
}
LRESULT CALLBACK
WndProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
switch( msg )
{
case WM_LBUTTONDOWN:
MessageBox( 0, L"Hello, World", 0, 0 );
return 0;
case WM_KEYDOWN:
if( wParam == VK_ESCAPE )
DestroyWindow( ghMainWnd );
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hWnd, msg, wParam, lParam);
}

Answer 1

Change this:
if( ghMainWnd = 0 )
{
MessageBox( 0, L"Window Creation FAILED", 0, 0 );
return false;
}
to:
if( ghMainWnd == 0 )
{
MessageBox( 0, L"Window Creation FAILED", 0, 0 );
return false;
}
Two equals signs instead of one. :)

Answer 2

Wild guess: _UNICODE is not defined by project settings. Use CreateWindowW, RegisterClassW, to avoid dependency.