Running game C# visual studio windows form

Question

i am currently making a running game for my college assingment using c# with visual studio 2011, currently i managed to make my character jump but i need to make it jump more than once can someone help me with the code?i would appreciate any kind of help

thanks  

 

this is my code for making my player jump

 

in FormKeyDown

 

if (jump == false)

{

if (e.KeyCode == Keys.Space)

{

jump = true;

force = gravity;

}

}

 

in timer

 

if(jump)

{

player.Top -= force;

force--;

}

if(player.Top + player.Height >= screen.Height)

{

player.Top = screen.Height - player.Height;

jump = false;

}

else

{

player.Top += 1;

}