hey, if you mean a custom messagebox that acts somehow like the normal messagebox, why don't you add a new form removing the ControlBox from the form, and to activate this messagebox make a static method in the custom messagebox form that have the title and the text of the messagebox (stored in a label ofcourse) and disabling the enabled forms by looping through the enabled forms and storing them in a temporary list and disabling them. Also when the user close or clicking the ok button, the forms in the list are enabled again.Beside that in the static function make a loop to check the response in the form if its ok or canceled by looping around and Application.DoEvent(); wiht a lil Sleep of the thread.
In MessageBoxForm:
bool Response=false;
string result;
List<Form> forms=new List<Form>();
public void DisableForms()
{
foreach(Form f in Application.OpenForms)
{
if(f.Enabled&&f!=this)
{
forms.Add(f);
f.Enabled=false;
}
}
}
public string Result()
{
return result;
}
protected void btnOK_Click(object sender, EventArgs e)
{
result="OK";
Response=true;
}
protected void MessageBoxForm_FormClosing(object sender, EventArgs e)
{
result="Cancel";
Response=true;
}
public void EnableForms()
{
foreach(Form f in forms)
{
f.Enabled=true;
}
}
public static string Show(string title,string text)
{
MessageBoxForm msg=new MessageBoxForm();
msg.Show();
msg.DisableForms();
while(!msg.Response)
{
Application.DoEvent();
System.Threading.Thread.Sleep(30);
}
msg.EnableForms();
return msg.Result();
}

there is also a missing function:
public void SetMessage(string title,string text)
{
this.Text=title;
this.label1.Text=text;
}
in the Show static method:
msg.Show();
msg.SetMessage(title,text);
msg.DisableForms();

Thx muster for the help, But I'm not able to understand the use/need of that "Ok" button there.
I've added the Form Click function to close this popup (Form).
private void messageBoxForm_Click(object sender, EventArgs e)
{
this.Close();
}
I'm planning to use this messageBox as an alternative to defalt messageBox function. Which means....
I'm having a form... <span style="color=blue;">Form1</span>, and now I'm having this messageBoxForm. I was thinking of passing on the strings (title, msgtext) from Form1; into two labels.. label1 & label2 in messageBoxForm.
So I think I need a way to send strings (title, msgtext) out from Form1, or call that static string show from messageBoxForm.
??????????

This means that I've to use <b>SetMessage</b> method in <span style="color=red;">Form1</span>, and call it's string values in <b>static string show</b> method in <span style="color=red;">messageBoxForm</span>.
.

hello, the setmessage and the Show method are methods that can be changed to several things according to the programmer. If you want to make an OK messagebox without a yes/no or yes/no/cancel then all you have to do in the button_OK eventhandler is set the result to "OK" which is not important anyway and set the response to true (Response=true; ) so the user gets the result. Also i forgot to close the form after msg.EnableForms(); so you have to add
try
{
msg.Close();
}
catch(Exception)
{
}