Convert Hexstring to date in VC++ 6.0

[Ezima Ugwu]

Hi,
I have a date value that is converted to long in VB using
CLng(Cdate(valu e) and the the long value is converted to a HexString which is then stored in the registry.

I have a VC++ 6.0 application that reads this value from the registry and use the date but I am having problem converting the read Hexstring back the date value in my VC++ code.

Say I start with CLng(CDate(02/01/2011)) and then convert this a "AF5B" (not the real value**) which is then stored in the registry.

I wish to read "AF5B" in VC++ and be able to convert it back to 02/01/2011".

Any ideas on how I can do this? Any help appreciated.

Thanks,

Ezima Ugwu.

[weaknessforcats]

Can yu not just convert the hex string to an int and create another CDate?

[Ezima Ugwu]

Hi,

I am reading the hexstring from VC++ and the only methods I know such as time_t, CTime, COleDateTime etc are not generating the correct date. I cannot do a direct CDate cast in VC++.

Thanks,

Ezima Ugwu

[weaknessforcats]

You say you start with this:

Say I start with CLng(CDate(02/01/2011))

is this not part of your C++ Program? Because you are creating a CDate as an argument to CLng. This is not a cast but is a constructor call. Other constructors of CDate take an int as an argument.

You can cnvert your hex string to an int and then create a CDate object using the string. You should be able to get your date from this object.

[Ezima Ugwu]

Hi all,
I have now figured this out. VB uses Ole Automation so the correct C++ datetime format is COleDateTime. I convert the long value from VB to a double and assign it to a COleDateTime variable and the rest is done using COleDateTime class members.

Thanks to all those that replied.

Ezima Ugwu.