DM_SETDROPDOWNOPENED
The DM_SETDROPDOWNOPENED message is sent to the dialog manager
to open or close a combo box or history list.
Param1
The ID of the element for which the combo box (DI_COMBOBOX)
or history list (DI_EDIT or
DI_FIXEDIT with the
DIF_HISTORY flag) should be opened.
Param2
TRUE - open the list for the element with the given ID.
FALSE - close the open combo box or history list. In this case Param1 is ignored.
FALSE - close the open combo box or history list. In this case Param1 is ignored.
Return
If Param2=FALSE the returned value is always TRUE.
If Param2=TRUE, the returned value is TRUE if the combo box or history list has been opened successfully. FALSE is returned if ID of not suppored type was set.
If Param2=TRUE, the returned value is TRUE if the combo box or history list has been opened successfully. FALSE is returned if ID of not suppored type was set.
Controls
| Control | Description |
|---|---|
| DI_COMBOBOX | combined list |
| DI_EDIT | edit line |
| DI_FIXEDIT | fixed-size input field |
Remarks
Only one combo box or history list can be open in a dialog at the same time.
Therefore, sending this message with Param2=
TRUE closes an already opened combo box
before opening the specified one, and when sending the message with Param2=FALSE
it is not needed to specify the item ID.
Example
See also: