This message calculates the approximate width and height required to display a specified number of items.
At a Glance
| Header file: | Commctrl.h |
| Windows CE versions: | 2.0 and later |
| Related macro: | ListView_ApproximateViewRect |
Syntax
LVM_APPROXIMATEVIEWRECT wParam = (WPARAM)(INT) iCount;
lParam = (LPARAM) MAKELPARAM(cx, cy);
Parameters
iCount
Number of items to be displayed in the control. If this parameter is set to –1, the message uses the total number of items in the control.
cx and cy
Specify the proposed dimensions of the control, in pixels. Either parameter can beset to –1 to allow the message to use the current width or height value.
Return Values
Returns a DWORD value that holds the approximate width and height needed to display the items, in pixels.
Remarks
Setting the size of the list view control based on the dimensions provided by this message can optimize redraw and reduce flicker.