Get all form and all control name

If you want just to calculate you might go for this :

Assembly asm = Assembly.GetExecutingAssembly();
Type[] tobjects = asm.GetTypes();
List<string> forms = new List<string>();
foreach (Type tobject in tobjects)
{
    if(tobject.IsSubclassOf(typeof(Form)))
    {
        forms.Add(tobject);
        Form frm = Activator.CreateInstance(tobject) as Form;
        foreach(Controls in frm.Controls)
         //calculate here.
    }
}

The list forms will hold all the types that are within the executing assembly.

Now you can easily create instance of each types and calculate the Controls within them.

I hope this will help you.
Cheers.
:rose:

This is the example code to get the hierarchical data with all Form names and embedded control names in "Text" property of TreeViewItem. You just need to call call "GetAllControl" function to iterate on forms.

void AddControl(TreeNodeCollection collection, Control ctrl)
{
    TreeNode node = new TreeNode(ctrl.Name);
    foreach (Control c in ctrl.Controls)
        AddControl(node.Nodes, c);
    collection.Add(node);
}
private TreeNodeCollection GetAllControls()
{ 
    TreeNode rootNode = new TreeNode();
    foreach (Form form in Application.OpenForms)
        AddControl(rootNode.Nodes, form);
    return rootNode.Nodes;
}

Usage Example:

private void Form1_Load(object sender, EventArgs e)
{
    foreach (TreeNode node in GetAllControls())
        treeView1.Nodes.Add(node);
}

P.S. I saw that I copied wring code in my previous answer, I tried to improve it but it is not updating. I don't know why is that, so I am posting another answer. Sorry for mess.

This is the example code to get the hierarchical data with all Form names and embedded control names in "Text" property of TreeViewItem. You just need to call call "GetAllControls" function to iterate on forms.

void AddControl(TreeNodeCollection collection, Control ctrl)
{
    TreeNode node = new TreeNode(ctrl.Name);
    foreach (Control c in ctrl.Controls)
        AddControl(node.Nodes, c);
    collection.Add(node);
}
private void Form1_Load(object sender, EventArgs e)
{
    foreach (TreeNode node in GetAllControls())
        treeView1.Nodes.Add(node);
}

Usage Example:

private void Form1_Load(object sender, EventArgs e)
{
    foreach (TreeNode node in GetAllControls())
        treeView1.Nodes.Add(node);
}