JCL Help:SetDisplayResolution

 JCL Help: SetDisplayResolution Function

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Summary

Changes the resolution of the screen.

Pascal

 function SetDisplayResolution(const XRes: DWORD; const YRes: DWORD): Longint;

Parameters

Parameters	Description
const XRes: DWORD	New Width of the screen, in pixels.
const YRes: DWORD	New Height of the screen, in pixels.

Return Value

Internally the ChangeDisplaySettings function is used to obtain the result. The possible return values are:

Value	Meaning
DISP_CHANGE_SUCCESSFUL	The settings change was successful.
DISP_CHANGE_RESTART	The computer must be restarted in order for the graphics mode to work.
DISP_CHANGE_BADFLAGS	An invalid set of flags was passed in.
DISP_CHANGE_BADPARAM	An invalid parameter was passed in. This can include an invalid flag or combination of flags.
DISP_CHANGE_FAILED	The display driver failed the specified graphics mode.
DISP_CHANGE_BADMODE	The graphics mode is not supported.
DISP_CHANGE_NOTUPDATED	Windows NT/2000: Unable to write settings to the registry.

Description

Dynamically changes the resolution (width and height) of the visible device surface of the default display device. In simpler terms, changes the width and height of the screen. If the function succeeds the system automatically sends a WM_DISPLAYCHANGE message to all running applications.

About

Unit

JclMiscel

Donator

John C Molyneux

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