making Class Libarary (dll)

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VB

i wanted to make a dll for a function with multiple parameters
in that one parameter is for name of datagridview
if i pass the name in string it shows that datasource could not be assigned to string

adp = New SqlDataAdapter("select CId,SrNo,Date,Name,Contact,Contact1,ResNumber,DOB,Age,Location,Qualification,CurrentOrganizatn,WorkExp,CalledBy,EQId,SentTo,HRStatus,Process,SentTo1,HRStatus1,Process1,SentTo2,HRStatus2,Process2,SentTo3,HRStatus3,Process3,SentTo4,HRStatus4,Process4,Remark,Remark1 from TotTab where convert(datetime,Date,105) between convert(datetime,'" + DispatchFrom + "',105) and convert(datetime,'" + DispatchTo + "',105) and SentTo='" + offerCb + "'   and HRStatus like 'rej%', con)

in other case if i want to use that dataset as datasource on other project it shows that dataset not defined

Private Sub DispatchBtn_Click(sender As System.Object, e As System.EventArgs) Handles DispatchBtn.Click

       Dim Hi As New dispatched.Class1
       Hi.selectDispatch(offerCb.Text, DispatchFrom.Text, DispatchTo.Text, My.Settings.Equation1ConnectionString)
       DispatchGrid.DataSource = Hi.ds1.Tables(0)
  
End Sub

how can i pass it can some 1 help me..