Different computers - different bugs ?

Question

Hello all, I'm stuck here (nothing new in this world). I have a program, that runs fine on my computer (where I actually developing C# Windows app), but appears to be buggy on another computer. Same Windows versions, same .NET Framework... Is there something I am overlooking ? Below I have a function code, which works on my computer, but does not on another (which is not the only one): // Autocomplete the combobox private void cbMake_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e) { int position = 0; if (e.KeyChar > 31) { position = cbMake.Text.Length; this.cbMake.SelectedIndex = this.cbMake.FindString(this.cbMake.Text); this.cbMake.Select(position, this.cbMake.Text.Length - position); } } Am I missing something ?