class HSUDialog: public TGTransientFrame

 Constructor. The parameter is the window name (on the bar)

 Destroy the dialog and all widgets

 Recalculate size of all widgets and the dialog

 Close window. Show may be called after this to make the window appear
 on the screen

 Show the window on the screen.
 The function returns if one of the buttons: "OK", "Cancel" is clicked.
 When the "OK" is clicked then all values from widgets are written
 to the corresponding variables and kTRUE is returned.
 Otherwise the values in the variables are not changed and kFALSE is returned.

 Private function to interact with the user's activity

 Add a new widget to the dialog widgets list

 Add an edit box for a string. The parameters are:
 pName - the name of the edit box in the dialog
 pStr  - pointer to variable from which the start value is taken
         and to which the new value will be copy
 iSize - maximum length of the string to copy

 As a function above but the second parameter is a TString

 Add an edit box for an integer variable

 Add an edit box for a Float_t variable

 Add a combo box. The second parameter define a variable for collecting
 the value corresponding to the option selected by the user.
 To add an option to the combo box use HSUDialog::AddEntry method.

 As a function above, but list box is created (few option visible at once).
 It doesn't look fine for less then 5 parameters (investigation needed !!!)

 Add a check button. The last parameter define the mask of bits which
 will be set if the check box is checked. It lets to modify different
 bits in one integer by few check boxes.

 Add a separator - horizontal line

 Add an label

 Add a widget for a name of a file. It allows to write the name down
 or select it by the root browser (run by a small button on the right).
 For the root browser the last parameter is used to define
 the set of file types which should be searched by the browser.

 It must be an array of Char_t* like:
   {
     user_friendly_name1, pattern1,
     user_friendly_name2, pattern2,

     0, 0
   }

 e.g:
   {
     "Macro files", "*.C",
     "HLD files",   "*.hld",
     0, 0
   }

 Two last elements in the array MUST be NULL.

 pStr must be a pointer to a string at least 255 B Long_t !

 Like the previous function but work with TString instead of Char_t*

 Like the previous function by the type of interesting file may be
 chosen by some defines (use bit operator | to select few)
 0x01 - "Macro files", "*.C"
 0x02 - "HLD files",   "*.hld"
 0x04 - "ROOT files",  "*.root"
 0x08 - "PostScript",  "*.ps"
 0x10 - "Encapsulated PostScript", "*.eps"
 0x20 - "Gif files",   "*.gif"
 0x40 - "All files",   "*"

 Like a previous function but TString* is the second parameter

 Like HSUDialog::AddOpenFileName but a different type
 of the root browser is called

 See HSUDialog::AddOpenFileName and HSUDialog::AddSaveFileName

 See HSUDialog::AddOpenFileName and HSUDialog::AddSaveFileName

 See HSUDialog::AddOpenFileName and HSUDialog::AddSaveFileName

 Add next entry to the PREVIOUS combo box or list box added to the dialog.
 The parameters define the sting in the display and a value which will
 be copy to the corresponding integer used in the widget's constructor