C# - Simulate mouse drag with SendInput (codeproject implementation) @JFLHV

Uploaded October 2022 | Updated September 2026, 1 week ago

How I simulate dragging the mouse in other Windows apps using C# SendInput function. A download from codeproject.com is used to build functions to drag the left and right mouse.

InputSender Download:
codeproject.com/Articles/5264831/How-to-Send-Inputs-using-Csharp

C# Automation Playlist:
youtube.com/playlist?list=PLAW4P1Sb_oJbIJIQd8-HPmsVUE6Ez6NFL&si=3rb4bQHNPmHYsaXs

#csharp

private void LeftDrag(Point start, Point end)
{
InputSender.SetCursorPosition(start.X, start.Y);

InputSender.SendMouseInput(new InputSender.MouseInput[]
{
new InputSender.MouseInput
{
dwFlags = (uint)InputSender.MouseEventF.LeftDown

}
});

Thread.Sleep(100);

InputSender.SetCursorPosition(end.X, end.Y);

// added to fix text not always being selected during drag
Thread.Sleep (100);

InputSender.SendMouseInput(new InputSender.MouseInput[]
{
new InputSender.MouseInput
{
dwFlags = (uint)InputSender.MouseEventF.LeftUp
}
});
}

$C# - Simulate mouse drag with SendInput (codeproject implementation) How I simulate dragging the mouse in other Windows apps using C# SendInput function. A download from codeproject.com is used to build functions to drag the left and right mouse. InputSender Download: https://www.codeproject.com/Articles/5264831/How-to-Send-Inputs-using-Csharp C# Automation Playlist: https://youtube.com/playlist?list=PLAW4P1Sb_oJbIJIQd8-HPmsVUE6Ez6NFL&si=3rb4bQHNPmHYsaXs #csharp private void LeftDrag(Point start, Point end) { InputSender.SetCursorPosition(start.X, start.Y); InputSender.SendMouseInput(new InputSender.MouseInput[] { new InputSender.MouseInput { dwFlags = (uint)InputSender.MouseEventF.LeftDown } }); Thread.Sleep(100); InputSender.SetCursorPosition(end.X, end.Y); // added to fix text not always being selected during drag Thread.Sleep (100); InputSender.SendMouseInput(new InputSender.MouseInput[] { new InputSender.MouseInput { dwFlags = (uint)InputSender.MouseEventF.LeftUp } }); }$

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