【C大事】第五讲 组合框控件，下拉列表

获得组合框控件的句柄
HWND hwndCombo1 = GetDlgItem(hwnd, IDC_COMBO1);

确定目前选项的索引
int curSel = ComboBox_GetCurSel(hwndCombo1);

删除项
ComboBox_DeleteString(hwndCombo1, 2);

取得有多少项
int getCount = ComboBox_GetCount(hwndCombo1);
TCHAR getcount[256];
itoa(getCount, getcount, 10);
MessageBox(hwnd, getcount, TEXT("总计有多少项"), MB_OK);

选定某项的值
ComboBox_SetCurSel(hwndCombo1, 2);

得到某项的值
TCHAR str[256];
ComboBox_GetLBText(hwndCombo1, 1, str);
MessageBox(hwnd, str, TEXT("得到选项的值为"), MB_OK);

添加内容：
ComboBox_AddtString(hwndComboOp, TEXT("+"));
ComboBox_InsertString(hwndComboOp, -1, TEXT("+"));

HWND hwndCombo1 = GetDlgItem(hwnd, IDC_COMBO1);
   switch(id)
  {
        case IDC_ADD:
	{
　　　　　　TCHAR str1[256];
	  GetDlgItemText(hwnd, IDC_EDIT1, str1, sizeof(str1));
	  ComboBox_AddString(hwndCombo1, str1);
	  SetDlgItemText(hwnd, IDC_EDIT1, TEXT(""));
	}
        break;
	case IDC_DEL:
	{
	  int curSel = ComboBox_GetCurSel(hwndCombo1);
	  if (CB_ERR == curSel){
		MessageBox(hwnd, TEXT("没有任何项被选择"), TEXT("错误"), MB_OK | MB_ICONERROR);
	        return ;
          }
	  ComboBox_DeleteString(hwndCombo1, curSel);
	}
        break;
	case IDC_SER:
	{
	　　TCHAR str2[256];
	   GetDlgItemText(hwnd, IDC_EDIT2, str2, sizeof(str2));
	   int icount = ComboBox_GetCount(hwndCombo1);
	   int i = 0;
	   BOOL bFound = FALSE;
	   for(i = 0; i < icount; i++){
		TCHAR str3[256];
		ComboBox_GetLBText(hwndCombo1, i, str3);
		if(lstrcmp(str2, str3) == 0){
			bFound = TRUE;
			ComboBox_SetCurSel(hwndCombo1, i);
		}
	  }
	  if(bFound){
		MessageBox(hwnd, TEXT("找到了"), TEXT("提示"), MB_OK);
	  }

　　　　 }
        break;

        default:
		break;
    }