visual basic programming by victor mavhiki

7/23/2019 visual basic programming by victor mavhiki

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Victor Mavhiki

Question 1

An application to accept a character from the keyboard and display whether it is avowel or not.

output

PublicClassfrm_vowelCheck

'Declarin VariablesDim c AsChar

Private!ubbtn_check_Click"sender As#b$ect% e As&ventArs(andlesbtn_check.Click

'Assinin characters to the te)tbo)

c * t)t_char.+e)t

'Displayin &rror Messae if numeric or characters are entered,f ,s-umeric"t)t_char.+e)t +henMessaeo).!how"/Please &nter an Alphabetical 0etter/% /+his is not anAlphabetical letter/

'Clearin the te)tbo)es after the &rror messae displayedt)t_result.Clear"

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Victor Mavhiki

t)t_char.Clear"

&lse,f c * /A/#r c * /&/#r c * /,/#r c * /#/#r c * /8/ +hen

'Displayin te)t /V#9&0/ in the te)tbo) if a vowel is enteredt)t_result.+e)t * /V#9&0/

&lse,f c * /a/#r c * /e/#r c * /i/#r c * /o/#r c * /u/ +hen

'Displayin te)t /V#9&0/ in the te)tbo) if a vowel is enteredt)t_result.+e)t * /V#9&0/

&lse'Displayin te)t /-#+ V#9&0/ in the te)tbo) if a non:vowel letter is entered

t)t_result.+e)t * /-#+ V#9&0/&nd,f &nd!ub

Private!ubbtn_clear_Click"sender As#b$ect% e As&ventArs(andlesbtn_clear.Click'Clear the te)tbo)est)t_char.Clear"t)t_result.Clear"&nd!ub

Private!ubbtn_e)it_Click"sender As#b$ect% e As&ventArs(andlesbtn_e)it.Click'&ndin the operations&nd&nd!ub

&ndClass

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Victor Mavhiki

Question 2

An application to accept a strin and convert the case of characters.

Output

PublicClassfrm_caseConv

'declarin variablesDimte)As!trin

Private!ubbtn_convert_Click"sender As#b$ect% e As&ventArs(andlesbtn_convert.Click

'Assinin strin to the te)tbo)te) * t)t_char.+e)t

'Displayin &rror messae if numeric data is entered,f ,s-umeric"t)t_char.+e)t +henMessaeo).!how"/Please &nter characters/%/+his is numeric/

'Clearin the te)tbo)es after the &rror messae displayedt)t_char.Clear"t)t_con.Clear"

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Victor Mavhiki

&lse,f t)t_char.+e)t * 0Case"t)t_char.+e)t +hen

'Convertin strin to upper caset)t_con.Append+e)t"8Case"t)t_char.+e)t

&lse,f t)t_char.+e)t * 8Case"t)t_char.+e)t +hen

'Convertin strin to lower caset)t_con.Append+e)t"0Case"t)t_char.+e)t&nd,f &nd!ub

Private!ubbtn_clear_Click"sender As#b$ect% e As&ventArs(andlesbtn_clear.Click

'Clearin the te)tbo)es as initiated by the button Cleart)t_con.Clear"t)t_char.Clear"

&nd!ub

Private!ubbtn_e)it_Click"sender As#b$ect% e As&ventArs(andlesbtn_e)it.Click

'end all operatios or Close&nd&nd!ub

&ndClass

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Victor Mavhiki

Question 5

An application to pick a date from a calendar control and display the day% month%year in separate te)tbo)es.

Output

PublicClassfrm_calender

Private!ub Date+imePicker7_ValueChaned"sender As#b$ect% e As&ventArs(andles Date+imePicker7.ValueChaned'assinin day's date to the te)bo) from date pickert)t_date.+e)t * Date+imePicker7.Value.Day

'assinin day of the week to the te)bo) from date picker

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Victor Mavhiki

t)t_day.+e)t * Date+imePicker7.Value.Day#f9eek.+o!trin

'assinin month to the te)bo) from date pickert)t_month.+e)t * Date+imePicker7.Value.Month

'assinin year to the te)bo) from date pickert)t_year.+e)t * Date+imePicker7.Value.=ear&nd!ub

Private!ubbtn_clear_Click"sender As#b$ect% e As&ventArs(andlesbtn_clear.Click'clearin date te)bo)t)t_date.Clear"

'clearin day te)bo)t)t_day.Clear"

'clearin month te)bo)t)t_month.Clear"

'clearin year te)bo)t)t_year.Clear"&nd!ub


'&nd the proram&nd

&nd!ub

&ndClass

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Victor Mavhiki

Question 4

A case select construct application to implement the calculator with memory andrecall operations.

Output

PublicClassfrm_calculator

'Delarin VariablesDim a% m As,nteerDim#ptnAsChar

Private!ubbtn_one_Click"sender As#b$ect% e As&ventArs(andlesbtn_one.Click

'Assinin the value /7/ to the te)tbo)t)t_operaations.Append+e)t"/7/&nd!ub

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Victor Mavhiki

Private!ubbtn_two_Click"sender As#b$ect% e As&ventArs(andlesbtn_two.Click


Private!ubbtn_three_Click"sender As#b$ect% e As&ventArs(andlesbtn_three.Click

'Assinin the value /;/ to the te)tbo)t)t_operaations.Append+e)t"/;/&nd!ub

Private!ubbtn_four_Click"sender As#b$ect% e As&ventArs(andlesbtn_four.Click


Private!ubbtn_>ve_Click"sender As#b$ect% e As&ventArs(andlesbtn_>ve.Click

'Assinin the value /</ to the te)tbo)t)t_operaations.Append+e)t"/</&nd!ub

Private!ubbtn_si)_Click"sender As#b$ect% e As&ventArs(andlesbtn_si).Click


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Victor Mavhiki

Private!ubbtn_seven_Click"sender As#b$ect% e As&ventArs(andlesbtn_seven.Click


Private!ubbtn_eiht_Click"sender As#b$ect% e As&ventArs(andlesbtn_eiht.Click


Private!ubbtn_nine_Click"sender As#b$ect% e As&ventArs(andlesbtn_nine.Click

'Assinin the value /?/ to the te)tbo)t)t_operaations.Append+e)t"/?/&nd!ub

Private!ubbtn_@ero_Click"sender As#b$ect% e As&ventArs([email protected]


Private!ubbtn_add_Click"sender As#b$ect% e As&ventArs(andlesbtn_add.Click

a * Val"t)t_operaations.+e)t'Assinin the #ption // to the te)tbo)#ptn * //t)t_operaations.Clear"&nd!ub

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Victor Mavhiki

Private!ubbtn_devide_Click"sender As#b$ect% e As&ventArs(andlesbtn_devide.Click

a * Val"t)t_operaations.+e)t'Assinin the #ption /B/ to the te)tbo)#ptn * /B/t)t_operaations.Clear"&nd!ub

Private!ubbtn_multiply_Click"sender As#b$ect% e As&ventArs(andlesbtn_multiply.Click

a * Val"t)t_operaations.+e)t'Assinin the #ption // to the te)tbo)#ptn * //t)t_operaations.Clear"&nd!ub

Private!ubbtn_subtract_Click"sender As#b$ect% e

As&ventArs(andlesbtn_subtract.Click

a * Val"t)t_operaations.+e)t'Assinin the #ption /:/ to the te)tbo)#ptn * /:/t)t_operaations.Clear"&nd!ub

Private!ubbtn_memory_Click"sender As#b$ect% e As&ventArs(andlesbtn_memory.Click

'Assinin the contents of the te)tbo) to the memory m * t)t_operaations.+e)tt)t_operaations.Clear"&nd!ub

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Victor Mavhiki

Private!ubbtn_recall_Click"sender As#b$ect% e As&ventArs(andlesbtn_recall.Click

'recallin what is in the memoryt)t_operaations.+e)t * m&nd!ub

Private!ubbtn_cancel_Click"sender As#b$ect% e As&ventArs(andlesbtn_cancel.Click

'cancellin the operations in the te)tbo)t)t_operaations.Clear"&nd!ub

Private!ubbtn_euals_Click"sender As#b$ect% e As&ventArs(andlesbtn_euals.Click

'selectin the operations / % :% % B/!electCase#ptnCase//t)t_operaations.+e)t * a Val"t)t_operaations.+e)tCase/:/t)t_operaations.+e)t * a : Val"t)t_operaations.+e)tCase//t)t_operaations.+e)t * a Val"t)t_operaations.+e)tCase/B/t)t_operaations.+e)t * a B Val"t)t_operaations.+e)t

&nd!elect&nd!ub


'endin all the operations

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Victor Mavhiki

&nd&nd!ub&ndClass

Question 3

A menu based application to implement te)t editor with cut% copy% paste% save andclose operations.

Output

PublicClassEorm7

Private!ub Eorm7_0oad"sender As#b$ect% e As&ventArs (andlesMyase.0oad

'(idin the lable% te)tbo) and a button on the formlbl_saveAs.Visible * Ealset)t_te)t!ave.Visible * Ealse

btn_save.Visible * Ealse&nd!ub

Private!ubbtn_save_Click"sender As#b$ect% e As&ventArs (andlesbtn_save.Click

'(ide the button% lable and te)tbo) on the form after savin the te)trt)_te)t&nter.!aveEile"C!tr"t)t_te)tsave.+e)tlbl_saveAs.Visible * Ealse

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Victor Mavhiki

t)t_te)tsave.Visible * Ealsebtn_save.Visible * Ealse&nd!ub

Private!ub!ave+ool!tripMenu,tem_Click"sender As#b$ect% e As&ventArs(andles!ave+ool!tripMenu,tem.Click

'unhide the lable% te)tbo) and a button on the formlbl_saveAs.Visible * +ruet)t_te)t!ave.Visible * +ruebtn_save.Visible * +rue&nd!ub

Private!ub-ew+ool!tripMenu,tem_Click"sender As#b$ect% e As&ventArs (andles-ew+ool!tripMenu,tem.Click

'Clearin the richte)tbo)rt)_te)t&nter.Clear"&nd!ub

Private!ubCopy+ool!tripMenu,tem_Click"sender As#b$ect% e As&ventArs(andlesCopy+ool!tripMenu,tem.Click

'copyin the te)t in the richte)tbo)rt)_te)t&nter.Copy"&nd!ub

Private!ubCut+ool!tripMenu,tem_Click"sender As#b$ect% e As&ventArs(andlesCut+ool!tripMenu,tem.Click

'cut the te)t in the richte)tbo)rt)_te)t&nter.Cut"&nd!ub

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Private!ubPaste+ool!tripMenu,tem_Click"sender As#b$ect% e As&ventArs(andlesPaste+ool!tripMenu,tem.Click

'paste the te)t copied or cut form the richte)tbo)rt)_te)t&nter.Paste"

&nd!ub

Private!ub8ndo+ool!tripMenu,tem_Click"sender As#b$ect% e As&ventArs(andles8ndo+ool!tripMenu,tem.Click

'undo the operationrt)_te)t&nter.8ndo"&nd!ub

Private!ubFedo+ool!tripMenu,tem_Click"sender As#b$ect% e As&ventArs(andlesFedo+ool!tripMenu,tem.Click

'redo the operationrt)_te)t&nter.Fedo"&nd!ub

Private!ub&)it+ool!tripMenu,tem_Click"sender As#b$ect% e As&ventArs(andles&)it+ool!tripMenu,tem.ClickMessaeo).!how"/Are you sure you want to e)it/% /Continue/&nd&nd!ub

Private!ub Close+ool!tripMenu,tem_Click_7"sender As#b$ect% e As&ventArs(andlesClose+ool!tripMenu,tem.Click

Messaeo).!how"/Are you sure you want to close/% /Continue/

'Clossin the oprations&nd&nd!ub

Private!ub -ew+ool!tripMenu,tem7_Click"sender As#b$ect% e As&ventArs(andles -ew+ool!tripMenu,tem7.Click

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'Clearin the richte)tbo)rt)_te)t&nter.Clear"&nd!ub

&ndClass

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visual basic programming by victor mavhiki

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