mciwndm-setzoom.md

title	description	ms.assetid	keywords	topic_type	api_name	api_location	api_type	ms.topic	ms.date
MCIWNDM_SETZOOM message (Vfw.h)	The MCIWNDM\_SETZOOM message resizes a video image according to a zoom factor. This marco adjusts the size of an MCIWnd window while maintaining a constant aspect ratio. You can send this message explicitly or by using the MCIWndSetZoom macro.	c899b678-5ba7-4f0a-9ef9-c5370b3b4ea8	MCIWNDM_SETZOOM message Windows Multimedia	apiref	MCIWNDM_SETZOOM	Vfw.h	HeaderDef	reference	05/31/2018

MCIWNDM_SETZOOM message

The MCIWNDM_SETZOOM message resizes a video image according to a zoom factor. This marco adjusts the size of an MCIWnd window while maintaining a constant aspect ratio. You can send this message explicitly or by using the MCIWndSetZoom macro.

MCIWNDM_SETZOOM 
wParam = 0; 
lParam = (LPARAM) (UINT) iZoom; 

Parameters

iZoom

Zoom factor expressed as a percentage of the original image. Specify 100 to display the image at its authored size, 200 to display the image at twice its normal size, or 50 to display the image at half its normal size.

Return Value

This message does not return a value.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Header	Vfw.h

See also

MCIWndSetZoom