C#
1. Login kasir part1 https://www.youtube.com/watch?v=X5CTzugo0tA 2. Membuat keypress dan key down http://csharp.net-informations.com/gui/key-press-cs.htm 3. Membuat maxsimaze this.WindowState = FormWindowState.Maximized; 4. Mengatasi form not close https://www.youtube.com/watch?v=pXCjFRFOF9A 4. membuar sistem role https://www.youtube.com/watch?v=mtnIvYbO2NY 5.crud https://www.youtube.com/watch?v=v283Kb80RjE 6. key press with f2 private void Form1_Load ( object sender, EventArgs e ) { this .KeyPreview = true ; this .KeyDown += new KeyEventHandler(Form1_KeyDown); } void Form1_KeyDown ( object sender, KeyEventArgs e ) { if (e.KeyCode.ToString() == "F1" ) { MessageBox.Show( "F1 pressed" ); } } 7. cara agar index select index.select(); 8. textbox number only https://www.delftstack.com/howto/csharp/how-to-make-a-textbox-that-only-accepts-numbers-in-csharp/ 9. pasing value return form https://stackoverflow.com/questions/523350...