Set a variable to the one field in a recordset object

This is the start of a complicated email, but I am taking it in steps.  I have begun with the outer most loop in that I need to get all the TaskID's from a query, but how to I assign each TaskID to the variable for the loop?  that is, each time through the outside loop, I want to use the TaskID and then move to the next TaskID and use that for the next loop.  

Private Sub cmdGenerate_Click()
'Generate final email to manager
Dim strUpdateHistory As String
Dim strUpdateCurrent As String
Dim strUpdateTitle   As String
Dim qdfUpdateHistory As QueryDef
Dim qdfUpdateCurrent As QueryDef
Dim qdfUpdateTitle   As QueryDef
Dim strTaskID       As String


Set rst = CurrentDb.OpenRecordset("Select TaskID from qryTasks_UpdatesEmail")
'HOW TO SET THE VARIABLE TO THE TASKID FROM THIS SELECT QUERY
With rst
  Do While Not .EOF
  
Set qdfUpdateTitle = CurrentDb.CreateQueryDef("qryUpdateTitle", strUpdateTitle)
DoCmd.OpenQuery "qryUpdateTitle"
DoCmd.Close acQuery, "qryUpdateTitle"

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