第一次使用win32寫代碼，將代碼中對Combo box 控件的使用做個總結(jié)：

1. ? 使用SendMessage向窗口發(fā)送消息，對Combo Box進行基本操作如添加數(shù)據(jù)，刪除數(shù)據(jù)，得到所選Item的值等，請參考：

? ? ???http://blog.csdn.net/qiurisuixiang/article/details/6746234

2. 使Combo box控件可見或不可見，需使用EnablkeWindow函數(shù)：

? ? EnableWindow(hCombo,TRUE);

? ? EnableWindow(hCombo,FALSE);

3. 響應Combo box的Notification message，比如選擇Combo box中一個不同于當前的Item時，會響應CBN_SELCHANGE消息。

MSDN的解釋：

CBN_SELCHANGE Notification

---

The?CBN_SELCHANGE?notification message is sent when the user changes the current selection in the list box of a combo box. The user can change the selection by clicking in the list box or by using the arrow keys. The parent window of the combo box receives this notification in the form of aWM_COMMAND?message with?CBN_SELCHANGE?in the high-order word of the?wParam?parameter.

Syntax

CBN_SELCHANGEWPARAM wParamLPARAM lParam;

Parameters

wParam

The low-order word specifies the control identifier of the combo box.

The high-order word specifies the notification message.

lParam

Handle to the combo box.?

Process Message Code：

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
????????? int wmId, wmEvent;

????????? switch (message)
????????? {
????????? case WM_COMMAND:

// low-order word specifies the control identifier of the combo box.

?????????????? wmId ? ?= LOWORD(wParam);??

//high-order word specifies the notification message.

?????????????? wmEvent = HIWORD(wParam);
????????????? // 分析菜單選擇:
????????????? switch (wmEvent)
???????????????{
?????????????? case CBN_SELCHANGE:
?????????????????????? if (wmId==IDC_COMBO_MODE) ? //判斷選中的是哪個Combo box
?????????????????????????{

????????????????? ???????????? . . . . . .

??????????????????????? }
?????????????????????? break;
???????????????}
????????????? break;
???????case WM_DESTROY:
??????????????PostQuitMessage(0);
??????????????break;

???????? ?//Although the dialog box procedure is similar to a window procedure,?

????????? //it must not call the?DefWindowProc?function to process unwanted messages
??????? //? default:
??????? //? return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}

總結(jié)

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