MaskedTextBoxt "calculator" input method

I have masked text box. Mask is simple "0000". But, I need my text box having cursor always docked to right, and my text shifting to left when I typing. Just like in ordinary calculator.

 this.TaskInput.Location = new System.Drawing.Point(184, 54);
  this.TaskInput.Mask = "000";
  this.TaskInput.Name = "TaskInput";
  this.TaskInput.PromptChar = '0';
  this.TaskInput.RightToLeft = System.Windows.Forms.RightToLeft.Yes;
  this.TaskInput.Size = new System.Drawing.Size(190, 20);
  this.TaskInput.TabIndex = 2;
 

Regards, Dmitry.

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