Hi,
Install the microsoft pocketpc in ur visual studio and open the new device application in windows mobile pocketpc and
use the namespace using Microsoft.WindowsMobile.PocketOutlook;
And then copy the code below u need to send sms like any button event
Code:
string a = textBox1.Text;
string sms = textBox2.Text;
SmsMessage message = new SmsMessage(a, sms);
message.Send(); Further, if u have any doubt , refer the below source code