How to make LDAP SSL call using DsBrowseForContainerW API

Hi, 

I am using DsBrowseForContainerW( ) to load all container (OUs ) from given domain.

 Internally Its using LDAP Non SSL call to read data from domain controller. But I want to use LDAP SSL communication to read data  from Domain Controllers.

How can I achieve this?

case-1 : ADsPath  = "LDAP://Domain100.Lab/DC=Domain100,DC=Lab"   working fine and LDAP Non SSL calls

case-2 : ADsPath  = "LDAP://dc12.Domain100.Lab:389/DC=Domain100,DC=Lab"   working fine and LDAP Non SSL calls

case-2 : ADsPath  = "LDAP://dc12.Domain100.Lab:636/DC=Domain100,DC=Lab"   NOT working fine 

LDAP Non SSL port = 389

LDAP SSL Port = 636

Code :

DSBrowseInfo dsbi = new DSBrowseInfo();
dsbi.cbStruct = System.Runtime.InteropServices.Marshal.SizeOf(dsbi);
dsbi.pszCaption = caption;
dsbi.pszTitle = title;
dsbi.pszRoot =  ldapPath;
dsbi.pszPath = sResult;
dsbi.cchPath = 1024;
dsbi.hwndOwner = hwnd;

if (user != null && user.Length > 0)
{
dsbi.pUserName = user;
dsbi.pPassword = password;
dsbi.dwFlags |= DSBI_HASCREDENTIALS;
}
int ret = DsBrowseForContainerW(ref dsbi);

In case-3, its giving error as unable to connect to domain with given user name and password.

Please help me to solve the issue. How can achieve LDAP SSL communication by using DsBrowseForContainerW() api.

Thanks & Regards

Prasad