How to assign Thisworkbook macro to Form control - excel

Question

I have a workbook to send out email reminders based on the due date. I would like to change it such that the macro will run when I click a button instead of running automatically when it is opened.
ThisWorkbook:
Sub Workbook_Open()
Dim ws As Worksheet
For Each ws In ThisWorkbook.Worksheets
If ws.Cells(1, 1).Value = "Feedback Report (FR) Log" Then CheckDates ws:=ws
Next ws
End Sub
Module1:
Option Explicit
Dim Bcell As Range
Dim iTo, iSubject, iBody As String
Dim ImportanceLevel As String
Public Sub CheckDates(ws As Worksheet)
For Each Bcell In Range("a4", Range("a" & Rows.Count).End(xlUp))
' if email column is not empty then command continues
If Bcell.Offset(0, 15) <> Empty Then
' mail will not be sent if current time is within 23.7 hours
' from time of mail last sent.
If Now() - Bcell.Offset(0, 49) > 0.9875 Then
If Bcell.Offset(0, 25) = Empty Then
If DateDiff("d", Now(), Bcell.Offset(0, 13)) = 7 Then
iTo = Bcell.Offset(0, 15)
iSubject = Bcell & " Due"
iBody = "<font face=""Calibri"" size=""3"">" & "Dear all,<br/><br/>" & _
"<u>FR No. " & Bcell & "</u><br/><br/>" & "Please be reminded that " & Bcell & " will be due by <b><FONT COLOR=#ff0000>" & _
Bcell.Offset(0, 13) & "</font></b>." & _
" Kindly ensure that the FR is closed by the due date and provide the draft FR report with preliminary investigation (Section B & D filled) to Quality.<br/><br/>" _
& "Thank you<br/><br/>" & "Best Regards,<br/>" & "Quality Department<br/><br/>" _
& "company Pte Ltd.<br/>" & "</font>"
SendEmail
Bcell.Offset(0, 49) = Now()
End If
End If
End If
End If
iTo = Empty
iSubject = Empty
iBody = Empty
Next Bcell
End Sub
Private Sub SendEmail()
Dim OutApp As Object
Dim OutMail As Object
Dim strbody As String
Set OutApp = CreateObject("Outlook.Application")
Set OutMail = OutApp.CreateItem(0)
On Error Resume Next
With OutMail
.To = iTo
.CC = "email#email.com"
.BCC = ""
.Subject = iSubject
.HTMLBody = iBody
.Importance = ImportanceLevel
'You can add a file like this
'.Attachments.Add ("C:\test.txt")
.send
End With
On Error GoTo 0
Set OutMail = Nothing
Set OutApp = Nothing
End Sub

Answer 1

You have two ways to accomplish this depending on the type of button you want to use to run the macro:
a) If the button is a simply Shape (Insert > Shapes), you need to move the contents of Workbook_Open to a new sub within your Module1 (let's call it "trigger") and right-click the shape > Assign macro > "trigger".
Sub trigger()
Dim ws As Worksheet
For Each ws In ThisWorkbook.Worksheets
If ws.Cells(1, 1).Value = "Feedback Report (FR) Log" Then CheckDates ws:=ws
End If
Next ws
End Sub
b) If the button is not a shape but a form button, you need to double-click it while on the design view and move the contents of "trigger" to its own click sub (CommandButton1_click()).
c) Finally, remember to remove the contents of Workbook_Open() sub.