Subtract DateTime?

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I need to get DateTime variable some hours back from current moment (TimeCurrent()). There is approximate sample how it can be done in Visual Basic (Subtract) function:

Dim date1 As New System.DateTime(1996, 6, 3, 22, 15, 0)
Dim date2 As New System.DateTime(1996, 12, 6, 13, 2, 0)
Dim date3 As New System.DateTime(1996, 10, 12, 8, 42, 0)

Dim diff1 As System.TimeSpan
' diff1 gets 185 days, 14 hours, and 47 minutes.
diff1 = date2.Subtract(date1)

Dim date4 As System.DateTime
' date4 gets 4/9/1996 5:55:00 PM.
date4 = date3.Subtract(diff1)

Dim diff2 As System.TimeSpan
' diff2 gets 55 days 4 hours and 20 minutes.
diff2 = System.DateTime.op_Subtraction(date2, date3)

Dim date5 As System.DateTime
' date5 gets 4/9/1996 5:55:00 PM.
date5 = System.DateTime.op_Subtraction(date1, diff2)

I need similar thing (Subtract) in MQL5. Does such one exist and if then please inform me?
 
SteelAce:

I need to get DateTime variable some hours back from current moment (TimeCurrent()). There is approximate sample how it can be done in Visual Basic (Subtract) function:

datetime PreviouseTime;
int FewHours = 3;


PreviousTime = TimeCurrent() - (FewHours * 60 * 60);  // Fewhours * 60 * 60 == seconds in FewHours
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