DTDay

Get the day part of a date & time string.

DTDay PROTO lpszDateTimeString:QWORD, DateFormat:QWORD

Parameters

lpszDateTimeString - Pointer to a buffer containing the date & time string to retrieve the day portion from. The format of the date & time string is determined by the DateFormat parameter.
DateFormat - Value indicating the date & time format used in the buffer pointed to by lpszDateTimeString parameter. The parameter can contain one of the following constants as listed in the DateTime Formats page and as defined in the DateTime.inc include file.

Returns

Returns the day value in RAX

Example

.data
DateTimeStringValue db "2008/03/21 16:21:01:00",0

.data?
DayValue dq ?

.code
Invoke DTDay, Addr DateTimeStringValue, CCYYMMDDHHMMSSMS
mov DayValue, rax ; save day part of date value to data variable
; rax should contain 21