C语言API编写窗口界面和button

#include<windows.h>
#include<stdio.h>

//声明回调函数
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

//主函数 程序入口
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("HelloWin") ;
HWND         hwnd ;        //用来保存成功创建窗口后返回的句柄
MSG          msg ;         //定义消息结构体变量
WNDCLASS     wndclass ;    //窗口类

wndclass.style         = CS_HREDRAW | CS_VREDRAW ; //指定窗口风格
wndclass.lpfnWndProc   = WndProc ; ////函数指针，指向处理窗口消息的函数入口
wndclass.cbClsExtra    = 0 ;       //结构体后附加的字节数，一般总为0
wndclass.cbWndExtra    = 0 ;       //窗口实例附加的字节数，一般总为0
wndclass.hInstance     = hInstance ;                          //模块句柄
wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;   //图标句柄 任务栏显示的图标
wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;       //光标句柄
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); //背景颜色COLOR_BACKGROUND
wndclass.lpszMenuName  = NULL ;      //菜单名的字符串
wndclass.lpszClassName = szAppName ; //自己定义类名，不要与其它类名反复

if (!RegisterClass (&wndclass))
{
MessageBox (NULL, TEXT ("注冊类失败!"), szAppName, MB_ICONERROR) ;
return 0 ;
}

int x =((GetSystemMetrics(SM_CXSCREEN)/2)-200); //x居中
int y =((GetSystemMetrics(SM_CYSCREEN)/2)-200); //y居中

//创建窗口API
hwnd = CreateWindow(szAppName,TEXT("毕业设计"),WS_CAPTION|WS_SYSMENU|WS_MINIMIZEBOX,x,y,400,400,NULL,NULL,hInstance,NULL);
//显示窗口的API 传入须要显示的窗口句柄和显示方式
ShowWindow(hwnd,iCmdShow);
//刷新窗口的API
UpdateWindow(hwnd);

//从系统的应用程序线程消息队列中取得一个消息
while(GetMessage(&msg,NULL,0,0) > 0)
{
DispatchMessage(&msg);
}
return msg.wParam;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC			 hdc;             //句柄
PAINTSTRUCT	 ps;
RECT			 rect;            //矩形
HINSTANCE       hInstance;       //窗口实例
static HWND     hwndButton[2];   //button句柄

switch (message)
{
case WM_CREATE: //创建button
{
hInstance = ((LPCREATESTRUCT)lParam)->hInstance;
//button1
hwndButton[0] = CreateWindow("BUTTON","训练",
WS_TABSTOP | WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON,
10,10,100,100,hwnd,NULL,
(HINSTANCE)GetWindowLong(hwnd, GWL_HINSTANCE), NULL);
//button2
hwndButton[1] = CreateWindow("BUTTON","获取",
WS_TABSTOP | WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON,
10,250,100,100,hwnd,NULL,
(HINSTANCE)GetWindowLong(hwnd, GWL_HINSTANCE), NULL);
return 0;
}
case WM_PAINT: //绘制文字
hdc = BeginPaint(hwnd,&ps);
GetClientRect(hwnd,&rect);
DrawText(hdc,TEXT("By:Eastmount CSDN制作"),-1,&rect,DT_SINGLELINE|DT_CENTER|DT_VCENTER);
EndPaint(hwnd,&ps);
return 0;
case WM_COMMAND: //响应button消息
if((HWND)lParam == hwndButton[0])
{
MessageBox(NULL,TEXT("是否训练图片?"),TEXT("提示"),MB_YESNO|MB_ICONQUESTION);
}
if((HWND)lParam == hwndButton[1])
{
MessageBox(NULL,TEXT("是否获取图片?

"),TEXT("提示"),MB_YESNO|MB_ICONQUESTION);
}
return 0;
case WM_CLOSE: //关闭
if(IDYES==MessageBox(hwnd,"是否关闭程序?","提示",MB_YESNO|MB_ICONQUESTION))
{
DestroyWindow (hwnd);
}
return 0;
case WM_DESTROY: //退出程序
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}

程序执行结果例如以下图所看到的:





当中主要涉及到的函数原型例如以下所看到的:

//创建窗口
hwnd = CreateWindow (
szClassName,         /* Classname */
"Windows App",       /* Title Text */
WS_OVERLAPPEDWINDOW, /* default window */
CW_USEDEFAULT,       /* Windows decides the position */
CW_USEDEFAULT,       /* where the window ends up on the screen */
544,                 /* The programs width */
375,                 /* and height in pixels */
HWND_DESKTOP,        /* The window is a child-window to desktop */
NULL,                /* No menu */
hThisInstance,       /* Program Instance handler */
NULL                 /* No Window Creation data */
);
//创建按钮
hwndButton = CreateWindow(
"BUTTON",   // predefined class
"OK",       // button text
WS_VISIBLE | WS_CHILD | BS_DEFPUSHBUTTON,  // styles
10,         // starting x position
10,         // starting y position
100,        // button width
100,        // button height
hwnd,       // parent window
NULL,       // No menu
(HINSTANCE) GetWindowLong(hwnd, GWL_HINSTANCE),
NULL        // pointer not needed
);