L_UpdateMagGlassShape

#include "l_bitmap.h"

L_LTDIS_API L_INT L_UpdateMagGlassShape(hWnd, uMagGlassShape, hMagGlassRgn)

Updates the Magnifying Glass shape.

Parameters

L_HWND hWnd

Handle of the window to which the Magnifying Glass is attached.

L_UINT uMagGlassShape

Flags that indicate the magnifying glass shape. Possible values are:

Value Meaning
MAGGLASS_SHAPE_RECT [0] Rectangle shape of Magnifying Glass.
MAGGLASS_SHAPE_ELLIPSE [1] Ellipse shape of Magnifying Glass.
MAGGLASS_SHAPE_HRGN [2] User-defined shape of Magnifying Glass.

L_HRGN hMagGlassRgn

Handle to a Windows region that defines the Magnifying Glass shape. This parameter is used only if the uMagGlassShape parameter is MAGGLASS_SHAPE_HRGN.

Returns

Value Meaning
SUCCESS The function was successful.
< 1 An error occurred. Refer to Return Codes.

Comments

The width and height of the Magnifying Glass will be changed according to the width and height of the passed hMagGlassRgn parameter if the uMagGlassShape parameter was set to MAGGLASS_SHAPE_HRGN.

The Magnifying Glass will stop and this function will return an error value in two cases:

  1. If the value passed in the uMagGlassShape parameter was outside the defined values.

  2. If the value passed in the uMagGlassShape parameter was MAGGLASS_SHAPE_HRGN and the value passed to the hMagGlassRgn parameter was NULL.

Required DLLs and Libraries

Platforms

Win32, x64.

See Also

Functions

Topics

Example

This example sets the shape of the Magnifying Glass to a round rectangular shape for an already started Magnifying Glass.

L_INT UpdateMagGlassShapeExample(L_HWND hWnd) 
{ 
   L_INT nRet; 
   HRGN  hRoundRectRgn; 
 
   hRoundRectRgn = CreateRoundRectRgn(0, 0, 100, 100, 25, 25); 
 
   nRet = L_UpdateMagGlassShape(hWnd, MAGGLASS_SHAPE_HRGN, hRoundRectRgn); 
   if(nRet != SUCCESS) 
      return nRet; 
 
   DeleteRgn(hRoundRectRgn); 
   return SUCCESS; 
} 

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