How to chanege settings for extended monitor and dual monitor programmatically?

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I have a Radeon Graphics card with 2 Graphics port one for VGA and other for DVI port. 2 monitor is connected on these 2 ports. I want to create an application that will show 2 options. 1> Extended, and 2> Dual screen and perform the followings.

Case1: (Extended) 1st monitor will work as primary monitor and 2nd monitor will work as extended monitor

Case2: (Dual Screen) 1st and 2nd monitors will work as a dual screen (Same display on both monitor)

Please help me.

Posted 14-Jul-10 23:06pm

Md. Ali Naser Khan

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El_Codero · Answer 1 · 2012-03-05T10:50:00

Hi,

it's possible to do this with the Device Context Reference which P/Invokes to USER32.dll . Have a look into ChangeDisplayFunction and EnumDisplaySettings, described here:

http://msdn.microsoft.com/en-us/library/dd183411.aspx[

http://www.pinvoke.net/default.aspx/user32/ChangeDisplaySettings.html

http://www.pinvoke.net/default.aspx/user32/EnumDisplayDevices.html

if you are an owner of nvidia graphics card, have a look into
nvidia api, you will need to P/Invoke NVCPL.DLL:

http://developer.download.nvidia.com/SDK/9.5/Samples/DEMOS/common/src/NvCpl/docs/NVControlPanel_API.pdf[^]

Best Regards