créer un GUI en utilisant la fenêtre API native

Question

Je suis en train de créer une interface graphique uniquement utiliser native windows api. i créer des projets dans vs 2008 en utilisant projet de console win32 et projet de fenêtre win32, et je l'ai utilisé l'exemple de code de Microsoft comme ci-dessous

#include <windows.h> 

// Global variable 

HINSTANCE hinst; 

// Function prototypes. 

int WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int); 
InitApplication(HINSTANCE); 
InitInstance(HINSTANCE, int); 
LRESULT CALLBACK MainWndProc(HWND, UINT, WPARAM, LPARAM); 

// Application entry point. 

int WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, 
    LPSTR lpCmdLine, int nCmdShow) 
{ 
    MSG msg; 

    if (!InitApplication(hinstance)) 
     return FALSE; 

    if (!InitInstance(hinstance, nCmdShow)) 
     return FALSE; 

    BOOL fGotMessage; 
    while ((fGotMessage = GetMessage(&msg, (HWND) NULL, 0, 0)) != 0 && fGotMessage != -1) 
    { 
     TranslateMessage(&msg); 
     DispatchMessage(&msg); 
    } 
    return msg.wParam; 
     UNREFERENCED_PARAMETER(lpCmdLine); 
} 

BOOL InitApplication(HINSTANCE hinstance) 
{ 
    WNDCLASSEX wcx; 

    // Fill in the window class structure with parameters 
    // that describe the main window. 

    wcx.cbSize = sizeof(wcx);   // size of structure 
    wcx.style = CS_HREDRAW | 
     CS_VREDRAW;     // redraw if size changes 
    wcx.lpfnWndProc = MainWndProc;  // points to window procedure 
    wcx.cbClsExtra = 0;    // no extra class memory 
    wcx.cbWndExtra = 0;    // no extra window memory 
    wcx.hInstance = hinstance;   // handle to instance 
    wcx.hIcon = LoadIcon(NULL, 
     IDI_APPLICATION);    // predefined app. icon 
    wcx.hCursor = LoadCursor(NULL, 
     IDC_ARROW);     // predefined arrow 
    wcx.hbrBackground = GetStockObject( 
     WHITE_BRUSH);     // white background brush 
    wcx.lpszMenuName = "MainMenu"; // name of menu resource 
    wcx.lpszClassName = "MainWClass"; // name of window class 
    wcx.hIconSm = LoadImage(hinstance, // small class icon 
     MAKEINTRESOURCE(5), 
     IMAGE_ICON, 
     GetSystemMetrics(SM_CXSMICON), 
     GetSystemMetrics(SM_CYSMICON), 
     LR_DEFAULTCOLOR); 

    // Register the window class. 

    return RegisterClassEx(&wcx); 
} 

BOOL InitInstance(HINSTANCE hinstance, int nCmdShow) 
{ 
    HWND hwnd; 

    // Save the application-instance handle. 

    hinst = hinstance; 

    // Create the main window. 

    hwnd = CreateWindow( 
     "MainWClass",  // name of window class 
     "Sample",   // title-bar string 
     WS_OVERLAPPEDWINDOW, // top-level window 
     CW_USEDEFAULT,  // default horizontal position 
     CW_USEDEFAULT,  // default vertical position 
     CW_USEDEFAULT,  // default width 
     CW_USEDEFAULT,  // default height 
     (HWND) NULL,   // no owner window 
     (HMENU) NULL,  // use class menu 
     hinstance,   // handle to application instance 
     (LPVOID) NULL);  // no window-creation data 

    if (!hwnd) 
     return FALSE; 

    // Show the window and send a WM_PAINT message to the window 
    // procedure. 

    ShowWindow(hwnd, nCmdShow); 
    UpdateWindow(hwnd); 
    return TRUE; 

} 

alors je suis les erreurs:

1>c:\users\helloworld\documents\visual studio 2008\projects\motionwindow2\motionwindow2\main.cpp(10) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int 
1>c:\users\helloworld\documents\visual studio 2008\projects\motionwindow2\motionwindow2\main.cpp(11) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int 
1>c:\users\helloworld\documents\visual studio 2008\projects\motionwindow2\motionwindow2\main.cpp(56) : error C2440: '=' : cannot convert from 'HGDIOBJ' to 'HBRUSH' 
1>  Conversion from 'void*' to pointer to non-'void' requires an explicit cast 
1>c:\users\helloworld\documents\visual studio 2008\projects\motionwindow2\motionwindow2\main.cpp(57) : error C2440: '=' : cannot convert from 'const char [9]' to 'LPCWSTR' 
1>  Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 
1>c:\users\helloworld\documents\visual studio 2008\projects\motionwindow2\motionwindow2\main.cpp(58) : error C2440: '=' : cannot convert from 'const char [11]' to 'LPCWSTR' 
1>  Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 
1>c:\users\helloworld\documents\visual studio 2008\projects\motionwindow2\motionwindow2\main.cpp(64) : error C2440: '=' : cannot convert from 'HANDLE' to 'HICON' 
1>  Conversion from 'void*' to pointer to non-'void' requires an explicit cast 
1>c:\users\helloworld\documents\visual studio 2008\projects\motionwindow2\motionwindow2\main.cpp(92) : error C2664: 'CreateWindowExW' : cannot convert parameter 2 from 'const char [11]' to 'LPCWSTR' 
1>  Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast 
1>Build log was saved at "file://c:\Users\HelloWorld\Documents\Visual Studio 2008\Projects\motionwindow2\motionwindow2\Debug\BuildLog.htm" 
1>motionwindow2 - 7 error(s), 0 warning(s) 
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== 

Quelqu'un sait ce que j'ai mal fait? Je n'ai pas du tout modifié le code, et c'est un projet vide.

Merci

Answer 1

Vous avez plusieurs problèmes:.

• L'échantillon a été le code C et vous compilez en C++. Certaines pratiques douteuses autorisées en C sont illégales en C++, telles que le downcast implicite de void * et le type de retour implicite.
• The sample is ANSI, but your project settings are UNICODE.
• The sample is designed for NO_STRICT, but you are building with STRICT.

Answer 2

La première erreur fait référence à la ligne 10.

Ainsi, regardez la ligne 10:

InitApplication(HINSTANCE); 

La déclaration n'a pas un type de résultat de la fonction.

Et ainsi de suite.

Vive & HTH,