Vba To Have Command Button Click Assign Number To Another Userform

Userform2 is popped up from another userform3.

How can I have userform 3 when clicked fill in a textbox on userform2 and then finally assign it to cell F3 on my worksheet.

VB:
Private Sub CommandButton2_Click()End Sub

So I need commandbutton2 (which needs to retain a value of 1` when clicked ) on Userform3 to assign the value of 1 to TextBox44 (Which is using control Source F3 so the value here ends up in F3

VB:
Private Sub TextBox44_Change()
If TextBox44 > 5 Then
MsgBox "Your entry must be part between 1 and 5", vbCritical
Exit Sub
End If
End Sub