Building Binary Tree

[7heavens]

Hi guys.. I want to build a Binary Tree (Not Binary Search Tree) which is complete using Linked List.. Any ideas? I have a search function implemented below which returns you a TreeNode pointer if it finds the element. I can't test it out coz I need to insert elements to test it.. How do you implement this insert function?? Any help is greatly appreciated.

class BT
{
	private:
	  
	struct TreeNode
	{
                    int key;
                    //Associated data type can be declared here
                    TreeNode *left, *right;
                 };

	TreeNode*_root;

	public:
                      TreeNode* InsertNode(TreeNode*T, int x)
                      {
                           //DON'T KNOW HOW TO INSERT!!!!
                          

                       }

                       TreeNode* SearchR(TreeNode* T,int key)
                      {
                             if (T==NULL)
                                   return NULL;
                             if (key == T->key)
	            {
                                 return T;
                             } 
                            else if (SearchR(T->right,key))
		return SearchR(T->right,key);
	           else if(Search(T->left,key))
 		return SearchR(T->left,key);             
                       }
};

[iMalc]

Hi guys.. I want to build a Binary Tree (Not Binary Search Tree) which is complete using Linked List..

What on earth does that all mean?