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Capture Up, Down event DateTimePicker

Capture Up, Down event DateTimePicker

Capture Up, Down event DateTimePicker


I would like to raise an event from a custom DateTimePicker when an user clicks the Up or Down button (with the distiction of Up/Down).

I know normally the OnValueChanged event is raised.

In my example I have a custom format (dddd) which only shows the day. So the Up/Down buttons do not work (no value changed is fired).

I override the WndProc and if m.Message == WM_NOTIFY, i cast the LWPARAM to NMHDR. The problem however is that the code of NMHDR is 722, no matter if you press the Up button or the Down button. I would like to make a distinction between the Up and Down button so I know which action to take. Can anyone tell me how I can determine which button is clicked?


RE: Capture Up, Down event DateTimePicker

you could do something along the lines of:

retrieving the value of the control.

then on change, work out if the value is greater (up) or less (down) clicked.

Would this be a reasonable solution?



Computing Design And Services:

RE: Capture Up, Down event DateTimePicker

hi martin,

tnx for your reply but i've already implemented a solution by intercepting windows message. turns out i have to convert to DTS_NUMDOWN.

tnx anyway,

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