How do I use get methods for TF1700 - finger print device

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C#

fingerprint

I have device TF1700 fingerprint scanner. in its manual for developers, there are some method:
[<a href="http://demo.sunrayztechnology.com/UploadDoc/22112014163844.pdf" target="_blank"
i could use set methods like set Time set IP and WriteLCD. but how do i use get methods
for example
GetEnrollData.
or
GetAllUserID
My task to write program that takes fingerprint from device and compare it with DB data.

What I have tried:

using zkempeerer;
class MyClass{
static void Main()
{ CZKEM cz = CZKEM();
cz.Connect_Net("191.168.1.20", 4370);
cz.WriteLCD(1,1, "sometxt");
cz.SetDeviceIp(some ip);

// could not use cz.SetUserInfo(int i, int a, string s, string d, int r, bool t); any other get methods
like...

/*method - GetUserInfo. method manual:
[Function]
Get user’s information from device. user’s information contain user’s name and password.
[Protocol]
SetUserInfo(dwMachineNumber As Long, dwEnrollNumber As Long, Name As String, Password As String, Privilege As Long, Enabled As Boolean) As Boolean
[Paramters]
dwMachineNumber
The Machine Number of operating device
dwEnrollNumber
Enroll number t
Name
User name
Password
User Password
Privilege
User privilege
Enabled
19
whether Enabled user
[Return]
TRUE if success, FALSE else
*/


}
}