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Execute a program in a second monitor

, 12 Mar 2014 CPOL
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With C# and the Windows API, you can execute a program in a second monitor.


I need to execute a slideshow on a second monitor. After a research, I found a way to get information about the monitor and how to specify the position for an exe. I couldn't find how to specify that the program begins on the second monitor. I could only find a way to open a program and then move the window of the program to the second monitor.


In .NET, you can get information about monitors using the namespace System.Windows.Forms. More information is available here: Screen class.

You can control the settings for windows with functions available here: Windows Functions.

Using the code

The parameters for the command line are: the number of monitors, the name of the program, the arguments for executing the program.

Example: monitor notepad.exe text.txt 2

With the above instruction on a cmd, Notepad opens on the second monitor in full screen and with the name of the file text.txt.

Here is part of the code. First, we get the number of monitors in the CPU. After that, we get the information about the monitor for displaying the exe. And finally, move the window to that monitor.

if (numberMonitor >=1 )
 if (Screen.AllScreens.Length < numberMonitor)
    MessageBox.Show("The monitor doesn't exist");
    //Get the data of the monitor
    monitor = Screen.AllScreens[numberMonitor].WorkingArea;
    //change the window to the second monitor
    SetWindowPos(proceso.MainWindowHandle, 0,
    monitor.Left, monitor.Top, monitor.Width,
    monitor.Height, 0);

Points of Interest

I didn't know that with .NET, you can get information about the screens and with the APIs for windows, you can control the position of any window if you have the handle to the window. And you can get the handle to any exe easily.

There are a lot functions in Windows APIs, for example, you can set the foreground any window, change to another window if you press ALT + TAB, etc.

With these functions, you can do for example:

  • A chat window that when receiving a message, can get to the front of other windows.
  • You can open other instances of your application and with buttons, you can change to other instances of your application.

I have examples of these functions that I explain in other articles.


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

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I'm a software developer. I like to develop web pages and desktop systems. I would like to learn about XNA, XCODE, ANDROID, KINECT.
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Comments and Discussions

QuestionProgram crash in IE or Chrome when excute 2 times PinmemberMember 1090453327-Jun-14 0:02 
QuestionNot notepad example PinmemberMember 103543496-Feb-14 2:53 
AnswerRe: Not notepad example Pinmemberapis344518-Feb-14 4:34 
AnswerRe: Not notepad example Pinmemberapis344510-Mar-14 18:51 
BugDoes not work on Windows 7 64-bit PinmemberMember 1032969310-Oct-13 23:28 
GeneralRe: Does not work on Windows 7 64-bit Pinmemberapis344518-Feb-14 4:35 
GeneralRe: Does not work on Windows 7 64-bit [modified] Pinmemberapis344510-Mar-14 18:59 
QuestionLooked All over the net for this - Thanx PinmemberAceApps14-Sep-13 13:32 
QuestionNot working out on Google Chrome.exe PinmemberMember 449259430-May-12 14:31 
AnswerRe: Not working out on Google Chrome.exe Pinmemberapis344518-Feb-14 4:36 

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