기본 컨트롤

#include <windows.h>

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
HINSTANCE g_hInst;
HWND hWndMain;
LPSTR lpszClass="FindWin";

int APIENTRY WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance
     ,LPSTR lpszCmdParam,int nCmdShow)
{
    HWND hWnd;
    MSG Message;
    WNDCLASS WndClass;
    g_hInst=hInstance;
    
    WndClass.cbClsExtra=0;
    WndClass.cbWndExtra=0;
    WndClass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
    WndClass.hCursor=LoadCursor(NULL,IDC_ARROW);
    WndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
    WndClass.hInstance=hInstance;
    WndClass.lpfnWndProc=(WNDPROC)WndProc;
    WndClass.lpszClassName=lpszClass;
    WndClass.lpszMenuName=NULL;
    WndClass.style=CS_HREDRAW | CS_VREDRAW;
    RegisterClass(&WndClass);

    hWnd=CreateWindow(lpszClass,lpszClass,WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,
        NULL,(HMENU)NULL,hInstance,NULL);
    ShowWindow(hWnd,nCmdShow);
    hWndMain=hWnd;
    
    while(GetMessage(&Message,0,0,0)) {
        TranslateMessage(&Message);
        DispatchMessage(&Message);
    }
    return Message.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
    HDC hdc;
    PAINTSTRUCT ps;
    HWND hFirst;
    static HWND h1,h2,h3;

    switch(iMessage) {
    case WM_CREATE:
        h1=CreateWindow("button","버튼",WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,
            20,20,100,25,hWnd,(HMENU)0,g_hInst,NULL);
        h2=CreateWindow("listbox",NULL,WS_CHILD | WS_VISIBLE | WS_BORDER,
            20,50,100,50,hWnd,(HMENU)1,g_hInst,NULL);
        h3=CreateWindow("edit","에디트",WS_CHILD | WS_VISIBLE | WS_BORDER ,
            20,110,100,25,hWnd,(HMENU)2,g_hInst,NULL);
        return 0;
    case WM_LBUTTONDOWN:
        hFirst=FindWindow(NULL,"First");
        if (hFirst == NULL) {
            MessageBox(hWnd,"First 예제를 찾을 수 없습니다.","알림",MB_OK);
        } else {
            MessageBox(hWnd,"First 예제가 실행중입니다","알림",MB_OK);
        }
        return 0;
    case WM_RBUTTONDOWN:
        hFirst=FindWindowEx(hWnd,NULL,NULL,"에디트");
        if (hFirst == NULL) {
            MessageBox(hWnd,"차일드 컨트롤이 없습니다.","알림",MB_OK);
        } else {
            MessageBox(hWnd,"차일드 컨트롤을 찾았습니다.","알림",MB_OK);
        }
        return 0;
    case WM_PAINT:
        hdc=BeginPaint(hWnd, &ps);
        EndPaint(hWnd, &ps);
        return 0;
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}