LVM_SETCALLBACKMASK
The
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.
LVM_SETCALLBACKMASK
wParam = (WPARAM) (UINT) mask;
lParam = 0;
Parameters
hwnd
Handle to the
list view control.
mask
Specifies the
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. |
For more
information about overlay images and state images, see List View Image Lists.
Return Values
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 get
the current callback mask, send the LVM_GETCALLBACKMASK message.
For more
information, see Callback Items and the Callback Mask.
See Also