ShowDropdown method displays either an IUIX_ColorPicker object interface if button was created with UIX_ButtonStyle_ColorPicker flag, or IUIX_CmdMenu object interface if one was set in IUIX_Button_Menu property.
In other cases it displays nothing.
HRESULT ShowDropdown([in, defaultvalue(-1)] VARIANT_BOOL bShow);
- [in, defaultvalue(-1)] value of VARIANT_BOOL. Displays object of IUIX_ColorPicker or IUIX_CmdMenu interface (if any) when bShow is set to VARIANT_TRUE, or hides this object when set to VARIANT_FALSE.
Returns S_OK if operation was successful or S_FALSE if nothing has been displayed.