MSG-TV-SELCHANGING
This event is fired when the selected item in a Tree-View control is going to be changed. The EVENT-DATA-2 data item contains the ID of the candidate item. EVENT-DATA-1 contains one of the following symbolic values, defined in
isgui.def, depending on the reason of the change.
TVFLAG-MOUSE | The new item is going to be selected with the mouse. |
TVFLAG-KEYBOARD | The new item is going to be selected with the keyboard. |
TVFLAG-PROGRAM | The new item is going to be programmatically selected by setting the Value property. |
Setting EVENT-ACTION to EVENT-ACTION-FAIL prevents the new item from being selected.