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Conditional Form Startup

Posted on 1997-03-26
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Last Modified: 2010-04-06
I wrote a program that was originally only displayed a single form at startup, now I want to (Based on a flag that is read from the registry) display another screen at startup is desired by the user.

I need to know how to not make FORM1 show  while starting FORM2 instead.
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Question by:jkb2
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3 Comments
 
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sperling earned 150 total points
ID: 1335008
In your Project source:
I assume Delphi 2, but technique will work with Delphi 1 too.
Also assume you have a function, 'ShouldCreateForm1' which returns a boolen.


begin
  Application.Initialize;  

  if ShouldCreateForm1
    then Application.CreateForm(TForm1, Form1)
    else Application.CreateForm(TForm2, Form2)

  Application.Run;
end.


The wanted form will now be created as the applications main form.

Regards,

Erik.
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by:jkb2
ID: 1335009
I believe I misrepresented the problem. The program that I have has 7 different forms and I want to make the startup form conditional as above.

My Program contains the above CreateForms for all of the forms that are in the Program.

Now how do I do that? :)

I apologize for not be more precise?


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LVL 3

Expert Comment

by:sperling
ID: 1335010
As you've found out... The first form created will become the applications main form, and therefore show first.


You could just do something like this, assuming you've got a variable FirstForm of type integer

case FirstForm of
  1 : Application.CreateForm(TForm1, Form1);
  2 : ...
  .
  .
end;

if Form1=nil then Application.CreateForm(Tform1, Form1);
if Form2=nil ....

This would create all forms, with the wanted one showing first..

Regards,

Erik.
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