Fonts rendered small as pixels - any help ?

[Pavel Troller]

Hi there,
  I have a small windoze application, written probably in VB, which should
accept a number from the user and display another number (it calculates new
numbers for the telephone exchange renumbering). The program itself works,
but any input given to the input box is rendered by a font exactly one
pixel in size, which means that typing the number draws a single graphical
line in the input box. Pressing a "calculate" button causes that a similar
line appears in the output box, probably representing the calculated number,
but due to its graphical representation it's unreadable :-).
  Other texts in the program (in dialog windows, or the description in the
main window) are written by usual, readable font, but the Calculate button
should contain the "=>" string and it contains just two pixels, too.
  I'm using couple of windoze programs which don't have this problem, it's
just a specialty of this single one. 
  I tried to remove all the cached metrics from my ~/.wine, but it didn't
help.
  Any help is highly appreciated. The program is small, about 25k, I can
send it to anybody to let him/her to test it.
                                         With regards, Pavel Troller