I got the error my windows phone apps project how to resolve it The name "ActivationManager" does not exist in the namespace "clr-namespace:SilverlightActivator;assembly=SilverlightActivator".

protected void ImageButton1_Click(object sender, ImageClickEventArgs e) { con1.Open(); SqlCommand cmd4 = new SqlCommand("UPDATE candidate_personal_details SET GUARDIAN_NAME='" + TextBox23.Text + "',GUARDIAN_PH_NO='" + TextBox24.Text + "',GUARDIAN_MOB='" + TextBox25.Text + "',NATIONALITY='" + TextBox26.Text + "', GENDER='" + DropDownList1.Text + "',D_O_B='" + TextBox27.Text + "' , PRESENT_ADDRESS='" + TextBox28.Text + "',DIST1='" + TextBox29.Text + "' ,PIN1='" + TextBox30.Text + "',PERMANENT_ADDRESS='" + TextBox31.Text + "',DIST2='" + TextBox32.Text + "',PIN2='" + TextBox33.Text + "',LOCAL_GUARDIAN_NAME='" + TextBox34.Text + "',LOCAL_GUARDIAN_ADDRESS='" + TextBox35.Text + "' ,DIST3='" + TextBox36.Text + "',PIN3='" + TextBox37.Text + "' ,LOCAL_GUARDIAN_PH_NO='" + TextBox38.Text + "' ,LOCAL_GUARDIAN_MOB='" + TextBox39.Text + "'WHERE EMAIL_ID='" + TextBox21.Text + "'", con1); SqlCommand cmd5 = new SqlCommand("UPDATE educational_details SET X_N_O_INSTITUTION='" + TextBox40.Text + "',X_N_O_BOARD='" + TextBox41.Text + "',X_Y_O_PASSING='" + TextBox42.Text + "',X_O_MARKS='" + TextBox43.Text + "',XII_N_O_INSTITUTION='" + TextBox45.Text + "',XII_N_O_BOARD='" + TextBox46.Text + "',XII_Y_O_PASSING='" + TextBox47.Text + "',XII_O_MARKS='" + TextBox48.Text + "',G_N_O_INSTITUTION='" + TextBox50.Text + "',G_N_O_BOARD='" + TextBox51.Text + "',G_Y_O_PASSING='" + TextBox52.Text + "',G_O_MARKS='" + TextBox53.Text + "'WHERE EMAIL_ID='" + TextBox21.Text + "'", con1); // SqlCommand cmd3 = new SqlCommand(sql2, con); cmd4.ExecuteNonQuery(); cmd5.ExecuteNonQuery(); con1.Close(); Label66.Text = "data is updated successfuly..."; // cmd3.ExecuteNonQuery(); }

compilation Error is given : Unable to Open include File ''windows.h

Error in code plz help me...

#include<stdio.h>
#include<conio.h>
#include<dos.h>
#include<windos.h>
void main(){
system("tree c:\\xampp");
getch();
}

I want to use the Windows CMD tree command in my C++ console application.it is possible ?