pass "this" as parameter

[incapacitant]

I have this code as exemple that uses "this" :

ApplicationWindow::ApplicationWindow()
    : QMainWindow( 0 )
{   
 
  // set background and size it correctly
  ( this )->resize( 569, 458 );

ApplicationWindow::ApplicationWindow()
    : QMainWindow( 0 )
{   
    
  // set background and size it correctly
  ( this )->resize( 569, 458 );

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I would need to call a procedure with "this" as parameter so that I can display stuff in "this" from the procedure. Like for instance resize "this" inside another procedure to make my main proc shorter and cleaner.

How do I declare the function ? What is the the type of "this" ?