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L_ILM_GETVIEWSIZE

Send this message to get the ImageList Control's view size.

Parameters

wParam

Ignored. Use 0.

lParam

Ignored. Use 0.

Returns

Value	Meaning
>= 0	The number of rows/columns that are "visible".
< 0	An error occurred. Refer to Return Codes.

Comments

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:

L_ImgListGetViewSize(hWnd)

For a complete list of available macros, refer to the Ltlst.h file.

Elements

Topics

Example

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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