[RESOLVED] OOP classes question about inheritance , Special Case in Here !!

[maged]

Dear all,
i have a situation in which i loop through the controls of a form.

i need to get the controls who is inherited from textbox or is a textbox itself

i have tried the following code

for each ctl as control in frmx.controls
if typeof ctl is textbox then
'do something
end if
next

this code works only for original textbox controls, but if i have controls that inherits from the textbox, it won't be collected

so i tried other code, like this

for each ctl as control in frmx.controls
if ctl.gettype.isassignablefrom(gettype(textbox)) then
' do something
end if
next

this give me only the inherited , not both !!!

i have also tried this code

for each ctl as control in frmx.controls
  If ctl.GetType.BaseType Is (GetType(textBox)) Then
  'do anything
  End If
next

this code works for only the inherited controls, but the original textbox do not work.

how can i set a condition to gather all textboxes and all controls who inherits from textbox. i dont want to use and / or operators as the code already is very heavy and complicated and recursive. it is driving me crazy already


thx in advance