模态对话框 messagebox

[bunnydu]

父窗口生成一个模态对话框 模态对话框中再调用messagebox 为什么消息框点击任何东西都没反应,但可以拖动.

[huaidan2012126]

代码？messagebox的消息拥有窗口是哪个？

[开飞机的贝塔塔]

LZ说的明白点，最后贴出相关代码。。。

[bunnydu]

这是父窗口调用的一个模态对话框的回调函数, 这个有一个messagebox

BOOL CALLBACK ProcWinProvince(HWND hWnd,UINT Msg,WPARAM wParam,LPARAM lParam)
{
	HWND hComboBox;
	PROVINCEDATA data,*province_data=&data;
	int province_index;
    switch(Msg)
    {
		case WM_INITDIALOG:
		{
			hComboBox = GetDlgItem(hWnd,IDC_COMBO_PROVINCE3);
			InitComboBox_Province(hComboBox);
			SendMessage(hComboBox, CB_SETCURSEL , 0, 0L); 
			province_index = (int)SendMessage(GetDlgItem(hWnd,IDC_COMBO_PROVINCE3),CB_GETCURSEL,0,0);
			if (NULL != (province_data = fetchProvinceByIndex(head,province_index))) 
			{
				SetDlgItemText (hWnd,IDC_EDIT21,province_data->discipline);
				SetDlgItemText (hWnd,IDC_EDIT22,province_data->telephone);
			}
		}
		break;

        case WM_COMMAND:
		{
			if  (lParam != 0)
            {
				switch (LOWORD(wParam))
				{
					case IDC_BUTTON21:
						province_index = (int)SendMessage(GetDlgItem(hWnd,IDC_COMBO_PROVINCE3),CB_GETCURSEL,0,0);
						GetDlgItemText(hWnd,IDC_COMBO_PROVINCE3,province_data->name,30);
						GetDlgItemText (hWnd,IDC_EDIT21,province_data->discipline,30);
						GetDlgItemText (hWnd,IDC_EDIT22,province_data->telephone,30);
						if (modifyProvinceByIndex (head,province_index,data) == 0)
						{
							MessageBox(hWnd,TEXT("修改成功"),TEXT("提示"),MB_OK);
						}
						
						break;
					case IDC_BUTTON22:
						EndDialog(hWnd,0);
						break;
					
				}
				if (HIWORD(wParam) == CBN_CLOSEUP)
				{
					switch (LOWORD(wParam))
					{
						case IDC_COMBO_PROVINCE3:
						province_index = (int)SendMessage(GetDlgItem(hWnd,IDC_COMBO_PROVINCE3),CB_GETCURSEL,0,0);
						if (NULL == (province_data = fetchProvinceByIndex(head,province_index)) && province_index > 0) 
						{
							SetDlgItemText (hWnd,IDC_EDIT21,TEXT("无信息"));
							SetDlgItemText (hWnd,IDC_EDIT22,TEXT("无信息"));
						}
						else
						{
							SetDlgItemText (hWnd,IDC_EDIT21,province_data->discipline);
							SetDlgItemText (hWnd,IDC_EDIT22,province_data->telephone);
						}
						break;
					}
				}
			}
		}
        break;

		case WM_DESTROY:
		{
			EndDialog(hWnd,0);
		}
		break;

        default:
            return DefWindowProc(hWnd, Msg, wParam, lParam );
    }
    return 0;
}

[bunnydu]

修改成功那个确定按了一直没反应.

[许文君]

messagebox的hwnd改为NULL

[huaidan2012126]

if (lParam != 0)
{
switch (LOWORD(wParam))
{
case IDC_BUTTON21:
province_index = (int)SendMessage(GetDlgIt(hWnd,IDC_COMBO_PROVINCE3),CB_GETCURSEL,0,0);
GetDlgItemText(hWnd,IDC_COMBO_PROVINCE3,province_data>name,30);
GetDlgItemText (hWnd,IDC_EDIT21,province_data>discipline,30);
GetDlgItemText (hWnd,IDC_EDIT22,province_data->telephone,30);
if (modifyProvinceByIndex (head,province_index,data) == 0)
{
MessageBox(hWnd,TEXT("修改成功"),TEXT("提示"),MB_OK);
}

break;
case IDC_BUTTON22:
EndDialog(hWnd,0);
break;
size=13px] default:
break;[[/size]
}
你再试一下？

[huaidan2012126]

	case WM_COMMAND:
			if (wParam!=0)
			{
				switch(LOWORD(wParam))
				case IDOK:
					::MessageBox(hDlg,"nihao",0,0);
				break;
				case IDC_BUTTON1:
					 EndDialog(hDlg,NULL);
				break;
				default:
				   return DefWindowProc(hDlg, message, wParam, lParam);
			}
			break;

这行代码也出现了你说的问题，弹出框无响应，但是可以移动，但是改为default:break;之后，弹出框正常了，我也不知道什么原因，那个大神给说道说道

[huaidan2012126]

或者直接default:break;删除，也正常

[bunnydu]

messagebox的hwnd改为NULL 也没用. 如果用hwnd 的话,弹出消息框之后,之后的那个框不可以激活了.改成NULL 之前的框可以激活了.

[bunnydu]

求大神路过..

[bunnydu]

解决了. default:
return DefWindowProc(hDlg, message, wParam, lParam);
这个删了就可以了. 什么原因我也不知道..

[huaidan2012126]

You should use the dialog box procedure only if you use the dialog box class for the dialog box. This is the default class and is used when no explicit class is specified in the dialog box template. Although the dialog box procedure is similar to a window procedure, it must not call the DefWindowProc function to process unwanted messages. Unwanted messages are processed internally by the dialog box window procedure.

上面是MSDN的解释，对话框的窗口过程跟普通窗口过程不太一样，不能调用DefWindowProc，你也可以看看MFC和ATL中的源代码，对话框过程中对不需要的消息都是直接返回0，即使对话框类也提供了DefWindowProc实现，它也是直接return 0（转）