hello world 程序优化
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这样使添加处理消息函数变得简单
步骤1: 头文件中添加相关项
步骤2: cpp添加具体实现方法
步骤3: 结构体数组中添加相关项
.h 文件:
struct DecodeUint{
UINT meesage;
LONG (*fun)(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
};
#define dim(x) (sizeof(x)/sizeof(x[0]))
LONG OnDestory(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
LONG OnPaint(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
.c文件:
#include
#include "Border.h"
struct DecodeUint MainMessageProc[] = {
WM_DESTROY,OnDestory,
WM_PAINT,OnPaint,
};
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
int WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int nCmdShow)
{
WNDCLASS wc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);
wc.hCursor = NULL;
wc.hIcon = NULL;
wc.hInstance = hInstance;
wc.lpfnWndProc = WndProc;
wc.lpszClassName = TEXT("hello");
wc.lpszMenuName = NULL;
wc.style = CS_HREDRAW | CS_VREDRAW;
if (!RegisterClass(&wc)) return -1;
HWND hWnd = CreateWindow(TEXT("hello"),TEXT("helloworld"), WS_VISIBLE | WS_BORDER | WS_SYSMENU | WS_MAXIMIZEBOX | WS_MINIMIZEBOX | WS_CAPTION,
10,10,320,240,NULL,NULL,hInstance,NULL);
UpdateWindow(hWnd);
ShowWindow(hWnd,nCmdShow);
MSG msg;
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return 1;
}
LONG OnDestory(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
PostQuitMessage(1);
return TRUE;
}
LONG OnPaint(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
PAINTSTRUCT ps;
HDC hdc;
RECT rect;
GetClientRect(hWnd,&rect);
hdc = BeginPaint(hWnd,&ps);
DrawText(hdc,TEXT("hello world"),-1,&rect,DT_VCENTER | DT_CENTER);
EndPaint(hWnd,&ps);
return TRUE;
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
for (int i = 0;i < dim(MainMessageProc); i++)
{
if (MainMessageProc[i].meesage == message)
{
(*MainMessageProc[i].fun)(hWnd,message,wParam,lParam);
}
}
return DefWindowProc(hWnd,message,wParam,lParam);
}