السلام عليكم 
أقصد  إذا كانت الورقة (1) تكست بوكس1= كذا 
إذا كانت الورقة (2) تكست بوكس1= كذا  
Private Sub UserForm_Activate() 
With Sheets("BUY") 
LL = ActiveCell.Rows.Row 
TextBox1.Value = Sheets("BUY").Cells(LL, "L") 
TextBox2.Value = Sheets("BUY").Cells(LL, "T") 
 TextBox3.Value = Sheets("BUY").Cells(LL, "U") 
 TextBox4 = "" 
 TextBox5.Value = Sheets("BUY").Cells(LL, "S") 
 TextBox6 = "" 
 ComboBox1.Value = Sheets("BUY").Cells(LL, "F").Address 
End With 
With Sheets("MAIN") 
 NN = ActiveCell.Row 
 TextBox1.Value = Sheets("MAIN").Cells(NN, "P") 
TextBox2.Value = Sheets("MAIN").Cells(NN, "S") 
 TextBox3.Value = Sheets("MAIN").Cells(NN, "T") 
 TextBox4 = "" 
 TextBox5.Value = Sheets("MAIN").Cells(NN, "V") 
 TextBox6 = "" 
  ComboBox1.Value = Sheets("MAIN").Cells(NN, "B").Address 
End With 
End Sub