Win32 window Program (C ++)

Editor's note: MFC has done a lot of work for us and it is necessary to learn the detailed process.

:

// Win32 dialog box. cpp: Defines the entry point for the application.

//

 

# Include "stdafx. h"

 

// Define the window message Response Function

Lresult callback WndProc (HWND hwnd,

UINT uMsg,

WPARAM wParam,

LPARAM lParam)

{

HDC hdc;

RECT rect;

PAINTSTRUCT ps; // receives the customer plot information returned by BeginPaint.

Switch (uMsg) // receives the client Region coordinates returned by GetClientRect

{

Case WM_PAINT:

{

// The pointer parameter generally indicates the return value of the receiving function, that is, _ out

Hdc = BeginPaint (hwnd, & ps );

GetClientRect (hwnd, & rect );

DrawText (hdc, "http://hi.baidu.com/darks00n",-1, & rect, DT_SINGLELINE | DT_CENTER | DT_VCENTER );

EndPaint (hwnd, & ps );

Break;

}

Case WM_DESTROY: // terminate the corresponding thread after the window is closed

{

PostQuitMessage (0 );

}

Default:

Break;

}

 

Return DefWindowProc (hwnd, uMsg, wParam, lParam); // The default message processing function is used to send unprocessed messages.

}

 

Int APIENTRY WinMain (HINSTANCE hInstance,

HINSTANCE hPrevInstance,

LPSTR lpCmdLine,

Int nCmdShow)

{

// Step 1. Fill in the WNDCLASS struct

WNDCLASS wndclass;

Wndclass. style = CS_HREDRAW | CS_VREDRAW;

Wndclass. lpfnWndProc = WndProc;

Wndclass. cbClsExtra = 0;

Wndclass. cbWndExtra = 0;

Wndclass. hInstance = hInstance;

Wndclass. hIcon = LoadIcon (NULL, IDI_APPLICATION );

Wndclass. hCursor = LoadCursor (NULL, IDC_ARROW );

Wndclass. hbrBackground = (HBRUSH) GetStockObject (BLACK_BRUSH );

Wndclass. lpszMenuName = NULL;

Wndclass. lpszClassName = "WND ";

 

// Step 2. register the window class

RegisterClass (& wndclass );

 

// Step 3. Create a window

HWND hwnd = CreateWindow ("WND", "Win32 dialog box", WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL );

 

// Step 4. Specify the display window status

ShowWindow (hwnd, nCmdShow );

 

// Step 5. display window (send WM_PAINT message)

UpdateWindow (hwnd );

 

// Step 6. Message loop (continuously retrieve and process messages from the window thread Message Queue)

MSG msg;

// The value 0 indicates that WM_QUIT exits the program, and-1 indicates that the Message failed to be obtained.

While (GetMessage (& msg, NULL, 0, 0)> 0)

{

// Translate messages (convert a virtual key message to a character message, and then return it to the window Message Queue)

TranslateMessage (& msg); // differentiate the PreTranslateMessage function in MFC

// Send the message to the Message response function (in this example, WndProc)

DispatchMessage (& msg );

}

 

Return msg. wParam;

}