Your Query is wrong. It should be like this.
Query = "SELECT MemberID FROM tblMember WHERE [MemberID] = " & MemberSelectedID
OR
Query = "SELECT MemberID FROM tblMember WHERE [MemberID] = '" & MemberSelectedID & "'"
MemberID field is Integer so no need to specify it as string.
In SQL Server single quote '
is used to specify string not double quote "
.