Problem using WinMain function with C++
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Hey, i hope you can help me with my question: I started learning working with DirectX, in the start i saw a codeexample for how open an empty window (without chosing winn app at the start of Visual Studio) but for some reson, the code makes me problems, hope you can say to me why code
#include <windows.h>
HINSTANCE hInst; // global handle to hold the application instance
HWND wndHandle; // global variable to hold the window handle// forward declarations
bool initWindow( HINSTANCE hInstance );
LRESULT CALLBACK WndProc( HWND, UINT, WPARAM, LPARAM );int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow )
{
// Initialize the window
if ( !initWindow( hInstance ) )
{
return false;
}// main message loop: MSG msg; ZeroMemory( &msg, sizeof( msg ) ); while( msg.message!=WM\_QUIT ) { // Check the message queue while (GetMessage(&msg, wndHandle, 0, 0) ) { TranslateMessage( &msg ); DispatchMessage( &msg ); } } return (int) msg.wParam;}
bool initWindow( HINSTANCE hInstance )
{
WNDCLASSEX wcex;
// Fill in the WNDCLASSEX structure. This describes how the window
// will look to the systemwcex.cbSize = sizeof(WNDCLASSEX); // the size of the structure wcex.style = CS\_HREDRAW | CS\_VREDRAW; // the class style wcex.lpfnWndProc = (WNDPROC)WndProc; // the window procedure callback wcex.cbClsExtra = 0; // extra bytes to allocate for this class wcex.cbWndExtra = 0; // extra bytes to allocate for this instance wcex.hInstance = hInstance; // handle to the application instance wcex.hIcon = 0; // icon to associate with the application wcex.hCursor = LoadCursor(NULL, IDC\_ARROW);// the default cursor wcex.hbrBackground = (HBRUSH)(COLOR\_WINDOW+1); // the background color wcex.lpszMenuName = NULL; // the resource name for the menu wcex.lpszClassName = “DirectXExample”; // the class name being created wcex.hIconSm = 0; // the handle to the small icon RegisterClassEx( &wcex ); // Create the window wndHandle = CreateWindow( "DirectXExample", "DirectXExample", WS\_OVERLAPPEDWINDOW, CW\_USEDEFAULT, // the starting x coordinate CW\_USEDEFAULT, // the starting y coordinate 640, // the pixel width of the window 480, // the pixel height of the window NULL, // the parent window; NULL for desktop NULL, // the menu for the application; NULL for hInstance, // the handle to the application instance NULL); // no values passed to the windo -
Hey, i hope you can help me with my question: I started learning working with DirectX, in the start i saw a codeexample for how open an empty window (without chosing winn app at the start of Visual Studio) but for some reson, the code makes me problems, hope you can say to me why code
#include <windows.h>
HINSTANCE hInst; // global handle to hold the application instance
HWND wndHandle; // global variable to hold the window handle// forward declarations
bool initWindow( HINSTANCE hInstance );
LRESULT CALLBACK WndProc( HWND, UINT, WPARAM, LPARAM );int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow )
{
// Initialize the window
if ( !initWindow( hInstance ) )
{
return false;
}// main message loop: MSG msg; ZeroMemory( &msg, sizeof( msg ) ); while( msg.message!=WM\_QUIT ) { // Check the message queue while (GetMessage(&msg, wndHandle, 0, 0) ) { TranslateMessage( &msg ); DispatchMessage( &msg ); } } return (int) msg.wParam;}
bool initWindow( HINSTANCE hInstance )
{
WNDCLASSEX wcex;
// Fill in the WNDCLASSEX structure. This describes how the window
// will look to the systemwcex.cbSize = sizeof(WNDCLASSEX); // the size of the structure wcex.style = CS\_HREDRAW | CS\_VREDRAW; // the class style wcex.lpfnWndProc = (WNDPROC)WndProc; // the window procedure callback wcex.cbClsExtra = 0; // extra bytes to allocate for this class wcex.cbWndExtra = 0; // extra bytes to allocate for this instance wcex.hInstance = hInstance; // handle to the application instance wcex.hIcon = 0; // icon to associate with the application wcex.hCursor = LoadCursor(NULL, IDC\_ARROW);// the default cursor wcex.hbrBackground = (HBRUSH)(COLOR\_WINDOW+1); // the background color wcex.lpszMenuName = NULL; // the resource name for the menu wcex.lpszClassName = “DirectXExample”; // the class name being created wcex.hIconSm = 0; // the handle to the small icon RegisterClassEx( &wcex ); // Create the window wndHandle = CreateWindow( "DirectXExample", "DirectXExample", WS\_OVERLAPPEDWINDOW, CW\_USEDEFAULT, // the starting x coordinate CW\_USEDEFAULT, // the starting y coordinate 640, // the pixel width of the window 480, // the pixel height of the window NULL, // the parent window; NULL for desktop NULL, // the menu for the application; NULL for hInstance, // the handle to the application instance NULL); // no values passed to the windonot sure right now about the winmain part it looks correct. The DirectXExample has to be a registered class name when you pass it to CreateWindow, it's not just some text you specify. from MSDN:
lpClassName:
Pointer to a null-terminated string or a class atom created by a previous call to the RegisterClass or RegisterClassEx function.
The atom must be in the low-order word of lpClassName; the high-order word must be zero.
If lpClassName is a string, it specifies the window class name. The class name can be any name registered with RegisterClass or RegisterClassEx,
provided that the module that registers the class is also the module that creates the window.
The class name can also be any of the predefined system class names.
For a list of system class names, see the Remarks section. -
Hey, i hope you can help me with my question: I started learning working with DirectX, in the start i saw a codeexample for how open an empty window (without chosing winn app at the start of Visual Studio) but for some reson, the code makes me problems, hope you can say to me why code
#include <windows.h>
HINSTANCE hInst; // global handle to hold the application instance
HWND wndHandle; // global variable to hold the window handle// forward declarations
bool initWindow( HINSTANCE hInstance );
LRESULT CALLBACK WndProc( HWND, UINT, WPARAM, LPARAM );int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow )
{
// Initialize the window
if ( !initWindow( hInstance ) )
{
return false;
}// main message loop: MSG msg; ZeroMemory( &msg, sizeof( msg ) ); while( msg.message!=WM\_QUIT ) { // Check the message queue while (GetMessage(&msg, wndHandle, 0, 0) ) { TranslateMessage( &msg ); DispatchMessage( &msg ); } } return (int) msg.wParam;}
bool initWindow( HINSTANCE hInstance )
{
WNDCLASSEX wcex;
// Fill in the WNDCLASSEX structure. This describes how the window
// will look to the systemwcex.cbSize = sizeof(WNDCLASSEX); // the size of the structure wcex.style = CS\_HREDRAW | CS\_VREDRAW; // the class style wcex.lpfnWndProc = (WNDPROC)WndProc; // the window procedure callback wcex.cbClsExtra = 0; // extra bytes to allocate for this class wcex.cbWndExtra = 0; // extra bytes to allocate for this instance wcex.hInstance = hInstance; // handle to the application instance wcex.hIcon = 0; // icon to associate with the application wcex.hCursor = LoadCursor(NULL, IDC\_ARROW);// the default cursor wcex.hbrBackground = (HBRUSH)(COLOR\_WINDOW+1); // the background color wcex.lpszMenuName = NULL; // the resource name for the menu wcex.lpszClassName = “DirectXExample”; // the class name being created wcex.hIconSm = 0; // the handle to the small icon RegisterClassEx( &wcex ); // Create the window wndHandle = CreateWindow( "DirectXExample", "DirectXExample", WS\_OVERLAPPEDWINDOW, CW\_USEDEFAULT, // the starting x coordinate CW\_USEDEFAULT, // the starting y coordinate 640, // the pixel width of the window 480, // the pixel height of the window NULL, // the parent window; NULL for desktop NULL, // the menu for the application; NULL for hInstance, // the handle to the application instance NULL); // no values passed to the windoGindi Bar Yahav wrote:
Error 2 error C2065: '“DirectXExample”' : undeclared identifier c:\users\יהב\documents\visual studio 2008\projects\learningdirectx\learningdirectx\winmain.cpp 56 LearningDirectX
It looks like you're using some abnormal quotation marks around your string constant; make sure you're using regular quotes and not smart quotes. Aside from that, make sure you're not compiling the program as UNICODE (unless you want to change your WinMain function to _tWinMain and wrap all your string constants with the TEXT(...) macro.)
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Gindi Bar Yahav wrote:
Error 2 error C2065: '“DirectXExample”' : undeclared identifier c:\users\יהב\documents\visual studio 2008\projects\learningdirectx\learningdirectx\winmain.cpp 56 LearningDirectX
It looks like you're using some abnormal quotation marks around your string constant; make sure you're using regular quotes and not smart quotes. Aside from that, make sure you're not compiling the program as UNICODE (unless you want to change your WinMain function to _tWinMain and wrap all your string constants with the TEXT(...) macro.)
Thanks!! you solved me the problem. i clicked properties and the "charset" was unicode, so i changed to multy-byte charcters (its ok?) but now its compiling me with no error, now i can go back to learn, thanks.
Gindi Bar Yahav - Web & Software defeloper.