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Date scheduling

Posted on 2014-12-10
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Last Modified: 2014-12-11
I have a form with the following fields:

Date of Last Visit (date field) named "txtDateOfPreviousVisit"
Visit Start Date (date field) named "txtStartDate"
Visit Frequency (number field) named "txtVisitFrequency"
Day of Week (number field) named "txtDayOfWeek"

When the form opens I want "txtStartDate" to populate with "txtDateOfPreviousVisit" + "txtVisitFrequency""

BUT...

If "txtDayOfWeek" is for example, 3 (which is Tuesday) then the "txtStartDate" has to be a Tuesday also but never past the "txtVisitFrequency" value.

If the date doesn't land on that day of the week then it has to be the correct day of the week prior to "txtDateOfPreviousVisit" + "txtVisitFrequency".

In other words, for example, if txtDateOfPreviousVisit is 12/9/2014 and txtDayOfWeek is 3 (Tuesday), and txtVisitFrequency is 90 then txtStartDate has to be 3/3/2015, not 3/9/2014 because that is a Monday.

Very complicated I know.  I sure hope someone can help.
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Question by:SteveL13
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Accepted Solution

by:
chaau earned 500 total points
ID: 40492735
This small chunk of code will get you started. Replace the hardcoded values for lastVisit, frequency, dayOfWeek with the values from your application and give it a go:
Private Sub Form_Load()
    Dim lastVisit As Date
    Dim startDate As Date
    Dim frequency, dayOfWeek As Integer
    
    lastVisit = #10/11/2014#
    frequency = 90
    dayOfWeek = 3
    
    startDate = lastVisit + frequency
    While DatePart("w", startDate) <> dayOfWeek
        startDate = startDate - 1
    Wend
    
End Sub

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Author Comment

by:SteveL13
ID: 40494089
Perfect.  Thank you very much.
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