How to Increase/Decrease mouse pointer moving speed on a WPF application surface?

Question

Hi there, I have a simple WPF application where I need to control the mouse pointer speed. Suppose I run the application and as soon as my mouse pointer enter the application area, the mouse pointer speed should be increase and I want some more modifications like in some part of the application the mouse pointer speed should be decrease. Depending upon how much portion area is covered by this application.

Let's talk about the speed of the Mouse Pointer. Suppose, I have three type of Mouse Pointer Speed variation like - 1x, 2x and 3x. In 1x the pointer speed is normal, In 2x the Speed is very much Faster and in 3x, the speed is very much slow and it below normal that means below 1x.

Now comes into the main topic that how my mouse pointer speed react according to the different surfaces and different portions of the WPF application. Actual this is the primary thing which I want and it's also the the purpose of asking this question.

Let's assume that, I have a WPF application which is Rectangular in Size. That means the Main GRID is Rectangular. In this Rectangle, I have two another Grid. Which are the Sub Grid of that Main GRID. One Sub Grid is in Triangle shape and another is Circular. When the Mouse pointer enter in the region of Main Grid (which is Rectangular in Size) at that time the Mouse pointer speed should be 2x (Which is very first), now I just move my mouse and suddenly it enters in the Triangle shape Grid region and my mouse pointer speed became 3x which is very much slow as I said earlier. Now in the last, in same way if the pointer enters in the Circular Grid the pointer speed became 1x which is normal.

Another important point is, if the Sub Grid positions are complex then How we decide? which Level of Mouse Speed sensitivity we need to fire up when Mouse cursor are hover on them?

The Answer is very much simple that if there any intersect position of Grid present then we should give priority to the last applied Grid on this type of overlapping position.

I attach few set of images to understand it properly. mouse_SPEED -1

mouse_SPEED - 2

mouse_SPEED - 3

I highlighted the Last applied Grid which is in circular shape in this case with Orange color for better understanding.In a single sentence I want to modify the mouse speed sensitivity to every UI element (like - Grid, Stack panel, button etc ) of a WPF application.

I tried some Stack Overflow code but that does not work.

Here is the Stack Overflow Question Link : https://stackoverflow.com/questions/2931122/dynamically-changing-mouse-speed

Here it is :

using System;
using System.Runtime.InteropServices;
namespace MouseSpeedSwitcher
{
    class Program
    {
        public const UInt32 SPI_SETMOUSESPEED = 0x0071;
        [DllImport("User32.dll")]
        static extern Boolean SystemParametersInfo(
            UInt32 uiAction, 
            UInt32 uiParam, 
            UInt32 pvParam,
            UInt32 fWinIni);
        static void Main(string[] args)
        {
            SystemParametersInfo(
                SPI_SETMOUSESPEED, 
                0, 
                uint.Parse(args[0]), 
                0);
        }
    }
}

I get error in this line :

uint.Parse(args[0]),

The error is : "The name 'args' does not exist in the current context". Actually the code which I tried above is a WinForms based solution, I does not know how can I apply it in a WPF C# project, especially for specific UI elements like - Grid, Stack panel, buttons etc.

Another part also that, How I can add three level of Mouse Speed sensitivity like 1x, 2x and 3x (As I said earlier). And the extra part is, How Can I add custom Mouse Speed sensitivity according to any random choices.

An Important point to remember is, in this question I often called it as Mouse Speed sensitivity but in term of Computer Science it's called DPI (Dots per inch). Dots per inch (DPI) is a measure of how sensitive a mouse is. A higher DPI means that the mouse cursor will move farther on the screen for each inch that the mouse is moved.

Accepted Answer

Hi,@MERUN KUMAR MAITY. Welcome to Microsoft Q&A.

Error Causes for Stack Overflow The program starts with the Main function as the entry function .If you use the parameter args[0] of the entry function, it means that the program needs to be executed in the console and pass the parameters, but you did not pass the parameters of the entry function, so an error is reported
Modify mouse speed in WPF

public const UInt32 SPI_SETMOUSESPEED = 0x0071;
uint newSpeed=20; // Set the speed of your mouse(1-20);The default value is 10

[DllImport("User32.dll")]
static extern Boolean SystemParametersInfo(UInt32 uiAction,UInt32 uiParam,UInt32 pvParam,UInt32 fWinIni);

public void Fun()
{
	bool result = SystemParametersInfo(SPI_SETMOUSESPEED, 0, newSpeed, 0);
}

By default, WPF executes the event for the topmost control
Refer to the example

public partial class MainWindow : Window
{
    public const UInt32 SPI_SETMOUSESPEED = 0x0071;
    uint newSpeed; // Set the speed of your mouse(1-20);The default value is 10

    [DllImport("User32.dll")]
    static extern Boolean SystemParametersInfo(UInt32 uiAction,UInt32 uiParam,UInt32 pvParam,UInt32 fWinIni);
    public MainWindow()
    {
        InitializeComponent();
    }
    private void rect1_MouseMove(object sender, MouseEventArgs e)
    {
        Point pt = e.GetPosition(this);  //Get the position of the mouse
        newSpeed = 10;
        bool result = SystemParametersInfo(SPI_SETMOUSESPEED, 0, newSpeed, 0);
        if (result == true)
        {
            this.lblInfo.Text = $"Speed 1x ({pt.X},{pt.Y})";
        }
        else
        {
            this.lblInfo.Text = $"Speed set failure";
        }
    }
    private void rect2_MouseMove(object sender, MouseEventArgs e)
    {
        Point pt = e.GetPosition(this);  //Get the position of the mouse
        bool result = SystemParametersInfo(SPI_SETMOUSESPEED, 0, newSpeed, 0);
        if(result==true)
        {
            this.lblInfo.Text = $"Speed 2x ({pt.X},{pt.Y})";
        }
        else
        {
            this.lblInfo.Text = $"Speed set failure";
        }
    }

    private void rect3_MouseMove(object sender, MouseEventArgs e)
    {
        Point pt = e.GetPosition(this);  //Get the position of the mouse
        newSpeed = 5;
        bool result = SystemParametersInfo(SPI_SETMOUSESPEED, 0, newSpeed, 0);
        if (result == true)
        {
            this.lblInfo.Text = $"Speed 3x ({pt.X},{pt.Y})";
        }
        else
        {
            this.lblInfo.Text = $"Speed set failure";
        }
    }

}

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How to Increase/Decrease mouse pointer moving speed on a WPF application surface?

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