C#

p.StartInfo.Arguments = @"""C:\My Dir\My file.txt""";

<br />
System.Diagnostics.Process p=new System.Diagnostics.Process();<br />
p.StartInfo.FileName="C:\\a.jpg";<br />
p.Start();	<br />
<br />
//this code open default jpg browser, and open c:\a.jpg in it.<br />

<br />
		private Point lastPos, offset;<br />
		private bool movingMe;<br />
<br />
		private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)<br />
		{<br />
			//Get the position of the top left corner of the form<br />
			Size zeroCoordinate = (Size)PointToScreen(new Point(-2,-30));<br />
			//Store the offset from top left corner to the current mouse position<br />
			Point mousePos = PointToScreen(new Point(e.X, e.Y));<br />
			offset = mousePos - zeroCoordinate;<br />
			movingMe = true;<br />
		}<br />
		private void Form1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)<br />
		{<br />
			if(movingMe)<br />
			{<br />
				int dX, dY;<br />
				Point mousePos = PointToScreen(new Point(e.X, e.Y));<br />
				dX=mousePos.X - lastPos.X;<br />
				dY=mousePos.Y - lastPos.Y;<br />
				if(dX != 0 || dY != 0)<br />
				{<br />
					this.Location = mousePos - (Size)offset;<br />
					this.Refresh();<br />
					lastPos = mousePos;<br />
				}<br />
			}<br />
<br />
		}<br />
		private void Form1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)<br />
		{<br />
			movingMe = false;<br />
		}<br />
<br />
This was an interesting problem, please let me know of any additional updates you make so I can add your changes to my code snippets.