콤보 박스 예제

#include <windows.h>

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);
HINSTANCE g_hInst;
HWND hWndMain;
LPCTSTR lpszClass=TEXT("MyComboBox");

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)(COLOR_WINDOW+1);
 WndClass.hCursor=LoadCursor(NULL,IDC_ARROW);
 WndClass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
 WndClass.hInstance=hInstance;
 WndClass.lpfnWndProc=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);
 
 while (GetMessage(&Message,NULL,0,0)) {
  TranslateMessage(&Message);
  DispatchMessage(&Message);
 }
 return (int)Message.wParam;
}

#define ID_COMBOBOX 100
TCHAR *Items[]={TEXT("Apple"),TEXT("Orange"),TEXT("Melon"),TEXT("Grape"),
 TEXT("Strawberry")};
HWND hCombo;
LRESULT CALLBACK WndProc(HWND hWnd,UINT iMessage,WPARAM wParam,LPARAM lParam)
{
 int i;
 TCHAR str[128];
 switch (iMessage) {
 case WM_CREATE:
  hCombo=CreateWindow(TEXT("combobox"),NULL,WS_CHILD | WS_VISIBLE |
   CBS_DROPDOWN,10,10,100,200,hWnd,(HMENU)ID_COMBOBOX,g_hInst,NULL);
  for (i=0;i<5;i++) {
   SendMessage(hCombo,CB_ADDSTRING,0,(LPARAM)Items[i]);
  }
  return 0;
 case WM_COMMAND:
  switch (LOWORD(wParam)) {
  case ID_COMBOBOX:
   switch (HIWORD(wParam)) {
   case CBN_SELCHANGE:
    i=SendMessage(hCombo, CB_GETCURSEL,0,0);
    SendMessage(hCombo, CB_GETLBTEXT, i, (LPARAM)str);
    SetWindowText(hWnd, str);
    break;
   case CBN_EDITCHANGE:
    GetWindowText(hCombo, str, 128);
    SetWindowText(hWnd,str);
    break;
   }
  }
  return 0;
 case WM_DESTROY:
  PostQuitMessage(0);
  return 0;
 }
 return(DefWindowProc(hWnd,iMessage,wParam,lParam));
}