Hello,
Does this help?
<font face=Courier New><SPAN style="color:#00007F">Sub</SPAN> i()<br><br><SPAN style="color:#00007F">Dim</SPAN> a<br><SPAN style="color:#00007F">Dim</SPAN> b<br><br><br>aRestart:<br> a = InputBox("a", "A", "a")<br> <SPAN style="color:#00007F">If</SPAN> a = "" <SPAN style="color:#00007F">Then</SPAN><br> MsgBox "A must be entered"<br> <SPAN style="color:#00007F">GoTo</SPAN> aRestart:<br> <SPAN style="color:#00007F">Else</SPAN><br> MsgBox a<br> <SPAN style="color:#00007F">End</SPAN> <SPAN style="color:#00007F">If</SPAN><br><br>bRestart:<br> b = InputBox("b", "B", "b")<br> <SPAN style="color:#00007F">If</SPAN> b = "" <SPAN style="color:#00007F">Then</SPAN><br> MsgBox "B must be entered"<br> <SPAN style="color:#00007F">GoTo</SPAN> bRestart:<br> <SPAN style="color:#00007F">Else</SPAN><br> MsgBox b<br> <SPAN style="color:#00007F">End</SPAN> <SPAN style="color:#00007F">If</SPAN><br><br><br><br><SPAN style="color:#00007F">End</SPAN> <SPAN style="color:#00007F">Sub</SPAN></FONT>