DTDateStringsCompare

Compare two date & time strings to determine if they are: equal in value, one is less than another, or one is greater than another.

DTDateStringsCompare PROTO lpszDateTimeString1:QWORD, lpszDateTimeString2:QWORD, DateFormat:QWORD

Parameters

lpszDateTimeString1 - Pointer to a buffer containing the first date & time string to compare. The format of the date & time string is determined by the DateFormat parameter.
lpszDateTimeString2 - Pointer to a buffer containing the second date & time string to compare. 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 both the lpszDateTimeString1 parameter and the lpszDateTimeString2 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

Return values in RAX indicate the following:

-1 First date is less than second date.
0 First date is equal to second date.
+1 First date is greater than second date.

Notes

The date & time string pointed to by the lpszDateTimeString1 parameter is compared against the date & time string pointed to by the lpszDateTimeString2 parameter.

Both dates are converted to QWORD values internally before the comparison to see which is greater or less than or equal.

If a date & time string contains time information this will be ignored.

Example

Invoke DTDateStringsCompare, Addr szDateTime1, Addr szDateTime2, CCYYMMDD