extract arabic letter from sentence or word

Question

i am developing a small program in vb6 that will work with an Arabic document, i want to count how many occurrence each Arabic letter appears in the document

basic arabic characters

ا أ إ آ ى ؤ ئ ء ب ت ة ث ج ح خ د ذ ر ز س ش ص ض ط ظ ع غ ف ق ك ل م ن ه

example sentence

البيت الكسز اللتيل الزجاج الست.‏

i don't know arabic or even know how to read it.

if vb6 won't work, i can use vb.net