VBA Code: How to select a sheet from a user inputbox

[OhMyGoodness]

Hey I am having trouble coding this vba code. I need the code to ask the user if they want data or a graph. If the user selects Yes From there, I need to the code to look at the selected input and see if that input is a valid sheet name. If not, the input box will display again until valid sheet name. If the sheet is valid then I need the sheet to be selected or show up whenever the user enters a valid value. I hope that makes sense.

For example, if the user enters (10-1) that is a valid sheet or (1-1) valid sheet but if it is (14-1) or (a-a) that is not a valid sheet and the input is re-ran again.

Note I have not gotten to the graphing part yet so do not worry about if the user selects no yet.

Code:

Sub InputValidation()
Dim str As String
Dim inp As String
Dim sht As Worksheet


str = MsgBox("Do you want to select a dataset (Yes) or a Graph (No)", vbQuestion + vbYesNo)

If str = vbYes Then
inp = InputBox("Please enter a load value (10 or a load and trial (10-1)")
If StrPtr(inp) = 0 Then
If MsgBox("Do you really want to QUIT", vbYesNo + vbQuestion) = vbYes Then MsgBox "Thank You Goodbye"
Exit Sub
End If
ElseIf inp = "#-#" Or "##-#" Then
If Sheets(sht).Name = inp Then
Worksheets(inp).Select
End If
Else
MsgBox "This load and test cannot be found"

If str = vbNo Then
inp = InputBox("Please enter a load value (10 or a load and trial (10-1)")
If StrPtr(inp) = 0 Then
If MsgBox("Do you really want to QUIT", vbYesNo + vbQuestion) = vbYes Then MsgBox "Thank You Goodbye"
Exit Sub
End If
End If
End If

End Sub

 

[Micron]

Why not use a userform with a listbox and list the sheets in it then user picks & clicks (or double clicks)? Prompting over and over for a valid name seems odd. Or maybe I read that wrong.
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