How to set a blank date as the initial value for Date Time Picker control (238077)

MORE INFORMATION

Windows Date Time Picker control and Microsoft Date Time Picker ActiveX controls change the time back to the current date even if you set it to blank by calling SetWindowText with a blank string as parameter.

The following steps describe a way to set a blank date as the initial value for Microsoft Date Time Picker ActiveX control.

1. Change the format type to custom format (3) and set the custom format to where one blank string.m_datePicker is a member variable created for the Windows Date Time Picker control placed on a dialog box.

      BOOL CDtpickerDlg::OnInitDialog()
      {
          CDialog::OnInitDialog();
   
          SetIcon(m_hIcon, TRUE);                 // Set big icon
          SetIcon(m_hIcon, FALSE);                // Set small icon
          
          m_datePicker.SetFormat(3);         // Change the format type to    custom format.
          m_datePicker.SetCustomFormat(" "); // One blank string.
   
          return TRUE;  // return TRUE  unless you set the focus to a control
      }
   
   						

2. Add an event handler for the Change event in your dialog class using ClassWizard.

      ON_EVENT(CDtpickerDlg, IDC_DTPICKER1, 2,OnChangeDtpicker1,VTS_NONE)
   						

   NOTE: If using Visual Studio.NET do the following: In the Property browser, on the Events tav, add an event handler for the Change event in your dialog class.
3. In the event handler (OnChangeDtPicker1) change the format back to the format you want.

      void CDtpickerDlg::OnChangeDtpicker1() 
      {
          m_datePicker.SetFormat(1);
      }
   						

You could use similar logic to set a blank date as an initial value for Windows Standard Date Time Picker control.

1. Call SetFormat with one blank string as parameter.

   m_dateCtrl.SetFormat(" "); //one blank

2. Add a notification message handler for the DTN_DATETIMECHANGE message in your dialog class and add the following code to it. Change the format type to the format you want.

      void CDateTimeCtrlDlg::OnDateTimeChange(NMHDR *pNotifyStruct, LRESULT    *result)
      {
           m_dateCtrl.SetFormat(DTS_SHORTDATEFORMAT);
           *pResult = 0;
      }
   						

(c) Microsoft Corporation 1999, All Rights Reserved. Contributions by Sreedhar Pelluru, Microsoft Corporation.