LVM_SETCALLBACKMASK message
Changes the callback mask for a list-view control. You can send this message explicitly or by using the ListView_SetCallbackMask macro.
Parameters
-
wParam
-
Value of the callback mask. The bits of the mask indicate the item states or images for which the application stores the current state data. This value can be any combination of the following constants:
Value Meaning - LVIS_CUT
The item is marked for a cut-and-paste operation. - LVIS_DROPHILITED
The item is highlighted as a drag-and-drop target. - LVIS_FOCUSED
The item has the focus. - LVIS_SELECTED
The item is selected. - LVIS_OVERLAYMASK
The application stores the image list index of the current overlay image for each item. - LVIS_STATEIMAGEMASK
The application stores the image list index of the current state image for each item. -
lParam
- Must be zero.
Return value
Returns TRUE if successful, or FALSE otherwise.
Remarks
The callback mask of a list-view control is a set of bit flags that specify the item states for which the application, rather than the control, stores the current data. The callback mask applies to all of the control's items, unlike the callback item designation, which applies to a specific item. The callback mask is zero by default, meaning that the list-view control stores all item state information. After creating a list-view control and initializing its items, you can send the LVM_SETCALLBACKMASK message to change the callback mask. To retrieve the current callback mask, send the LVM_GETCALLBACKMASK message.
For more information about overlay images and state images, see Adding List-View Image Lists.
For more information on list-view callbacks, see Callback Items and the Callback Mask.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows Vista [desktop apps only] |
| Minimum supported server |
Windows Server 2003 [desktop apps only] |
| Header |
|