Send this message to get the ImageList Control's view size.
Ignored. Use 0.
Ignored. Use 0.
Value | Meaning |
---|---|
>= 0 | The number of rows/columns that are "visible". |
< 0 | An error occurred. Refer to Return Codes. |
This message returns the size of the ImageList control's viewing area in rows or columns. The size includes partially visible rows/columns.
The value returned depends on the current scroll style . If the scroll style is SCROLLSTYLE_VERTICAL, then the value returned indicates rows. If the scroll style is SCROLLSTYLE_HORIZONTAL, then the value returned indicates columns.
The associated macro is:
For a complete list of available macros, refer to the Ltlst.h file.
L_INT ILM_GETVIEWSIZEExample(HWND hCtrl)
{
if(IsWindow(hCtrl))
{
L_INT32 nSize;
L_INT32 nFirst;
L_INT32 nLast;
L_INT32 nCols;
L_INT32 nCount;
//NOTE: assume scroll style = SCROLLSTYLE_VERTICAL
//get the view size
nSize = (L_INT32)SendMessage(hCtrl, L_ILM_GETVIEWSIZE, 0, 0);
//get the first visible item
nFirst = (L_INT32)SendMessage(hCtrl, L_ILM_GETFIRSTVISIBLE, 0, 0);
//get the column count
nCols = (L_INT32)SendMessage(hCtrl, L_ILM_GETCOLCOUNT, 0, 0);
//calculate the index of last visible item
nLast = nFirst + (nSize*nCols) - 1;//0 based index
nCount = (L_INT32)SendMessage(hCtrl, L_ILM_GETITEMCOUNT, 0, 0);
if(nLast > nCount-1)
nLast = nCount-1;
return SUCCESS;
}
else
return ERROR_INVALID_PARAMETER;
}
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