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Spencer Allen McMillan

Learnin' DirectX

4 posts in this topic

Hello, I'm in the process of learning DirectX 11 with the book "Beginning DirectX 11 Game Programming". I'm using Microsoft Visual Studio '10 and I'm trying to get a blank window running.

Here's the code I'm running:

[CODE]
#include <Windows.h>
LRESULT CALLBACK WndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
{
PAINTSTRUCT paintStruct;
HDC hDC;
switch( message )
{
case WM_PAINT:
hDC = BeginPaint( hwnd, &paintStruct );
EndPaint( hwnd, &paintStruct );
break;
case WM_DESTROY:
PostQuitMessage( 0 );
break;
default:
return DefWindowProc( hwnd, message, wParam, lParam );
}
return 0;
}
int WINAPI wWinMain( HINSTANCE hInstance, HINSTANCE prevInstance, LPWSTR cmdLine, int cmdShow )
{
UNREFERENCED_PARAMETER( prevInstance );
UNREFERENCED_PARAMETER( cmdLine );
WNDCLASSEX wndClass = {0};
wndClass.cbSize = sizeof( WNDCLASSEX ) ;
wndClass.style = CS_HREDRAW | CS_VREDRAW;
wndClass.lpfnWndProc = WndProc;
wndClass.hInstance = hInstance;
wndClass.hCursor = LoadCursor( NULL, IDC_ARROW );
wndClass.hbrBackground = (HBRUSH ) (COLOR_WINDOW + 1 );
wndClass.lpszMenuName = NULL;
wndClass.lpszClassName = "DX11BookWindowClass";
if( !RegisterClassEx (&wndClass ) )
return -1;
RECT rc = { 0, 0, 640, 480 };
AdjustWindowRect( &rc, WS_OVERLAPPEDWINDOW, FALSE );
HWND hwnd = CreateWindowA( "DX11BookWindowClass", "Blank Win32 Window",
WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, rc.right - rc.left,
rc.bottom-rc.top, NULL, NULL, hInstance, NULL );
if(!hwnd)
return-1;
ShowWindow( hwnd, cmdShow );
// demo init
MSG msg = { 0 };
while( msg.message != WM_QUIT )
{
if ( PeekMessage(&msg, 00, 0, 0, PM_REMOVE) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
else{
// Update
// Draw
}
}
// Demo Shutdown
return static_cast<int>( msg.wParam );
}
[/CODE]

The error I'm receiving is: error C2440: '=' : cannot convert from 'const char [20]' to 'LPCWSTR' .
For the line: wndClass.lpszClassName = "DX11BookWindowClass";

Any ideas as to how I can fix this?
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http://www.gamedev.net/topic/403518-cannot-convert-char-to-lpcwstr/ < That should help. I actually had the same issue with that book and that topic helped out. :P Damn Unicode.
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It was when I had the issue as well. :P I'm not very fluent in DX yet but that's one issue I run into a lot. :P Keep that fix handy, you'll need it.
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If it's easier, you can go to Project->Properties->General and change Use Character Set to Multibyte. This will switch off the UNICODE setting in on a project-wide basis.

Not recommending this for real code - we should all be using UNICODE as standard now, but when following code from an older book that does not use UNICODE, can be simpler.
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