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VBA/Excel/Access/Word/Language Basics/Variable Scope - История изменений
2026-04-06T00:12:18Z
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http://www.vbex.ru/index.php?title=VBA/Excel/Access/Word/Language_Basics/Variable_Scope&diff=1154&oldid=prev
в 16:33, 26 мая 2010
2010-05-26T16:33:00Z
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http://www.vbex.ru/index.php?title=VBA/Excel/Access/Word/Language_Basics/Variable_Scope&diff=1155&oldid=prev
Admin: 1 версия
2010-05-26T12:46:31Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>==Local variable==<br />
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<!-- start source code --><br />
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<source lang="vb"><br />
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Public Sub Procedure1()<br />
Dim intVariable1 As Integer<br />
Dim intVariable2 As Integer<br />
intVariable1 = 1<br />
intVariable2 = 2<br />
Debug.Print intVariable1<br />
Debug.Print intVariable2<br />
End Sub<br />
Public Sub Procedure2()<br />
Dim intVariable1 As Integer<br />
intVariable1 = 100<br />
Debug.Print intVariable1<br />
End Sub<br />
Public Sub TestLocal()<br />
Procedure1<br />
Procedure2<br />
Procedure1<br />
End Sub<br />
</source><br />
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==Local variables are available only in the procedure where they are declared==<br />
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<!-- start source code --><br />
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<source lang="vb"><br />
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Private Sub cmdOkay_Click()<br />
Dim strAnimal As String<br />
strAnimal = "Dog"<br />
Call ChangeAnimal<br />
Debug.Print strAnimal "Still Dog<br />
End Sub<br />
Private Sub ChangeAnimal()<br />
strAnimal = "Cat"<br />
End Sub<br />
</source><br />
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==Module level variable==<br />
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<!-- start source code --><br />
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<source lang="vb"><br />
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Option Explicit<br />
Dim Sales<br />
Sub Scope1()<br />
Sales = Sales + 1<br />
MsgBox Sales<br />
End Sub<br />
Sub Scope2()<br />
Sales = Sales + 10<br />
MsgBox Sales<br />
End Sub<br />
</source><br />
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==module-level variable declared with Private statement==<br />
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<!-- start source code --><br />
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<source lang="vb"><br />
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Option Explicit<br />
Private slsTax As Single " module-level variable declared with Private statement<br />
Sub CalcCost()<br />
"...Instructions of the procedure...<br />
End Sub<br />
</source><br />
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==Private module variable==<br />
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<!-- start source code --><br />
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<source lang="vb"><br />
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Option Explicit<br />
Private intModuleVariable As Integer<br />
Public Sub TestProc1()<br />
intModuleVariable = intModuleVariable + 1<br />
End Sub<br />
Public Sub TestProc2()<br />
Debug.Print intModuleVariable<br />
End Sub<br />
Public Sub TestProc3()<br />
Dim intModuleVariable As Integer<br />
intModuleVariable = 100<br />
Debug.Print intModuleVariable<br />
End Sub<br />
</source><br />
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==Procedure-Level (Local) Variables==<br />
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<!-- start source code --><br />
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<source lang="vb"><br />
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Option Explicit<br />
Dim slsTax As Single " module-level variable declared with Dim statement<br />
Sub CalcCost()<br />
"...Instructions of the procedure...<br />
End Sub<br />
</source><br />
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==Public Variables==<br />
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<!-- start source code --><br />
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<source lang="vb"><br />
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Option Explicit<br />
Public slsTax As Single<br />
Sub PublicCalcCost()<br />
"...Instructions of the procedure...<br />
End Sub<br />
</source><br />
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==sub module scope==<br />
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<!-- start source code --><br />
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<source lang="vb"><br />
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Sub LifeTime()<br />
Dim Sales<br />
Sales = Sales + 1<br />
MsgBox Sales<br />
End Sub<br />
</source><br />
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==Understanding and Using Static Variables==<br />
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<!-- start source code --><br />
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<source lang="vb"><br />
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Sub CostOfPurchase()<br />
" declare variables<br />
Static allPurchase<br />
Dim newPurchase As String<br />
Dim purchCost As Single<br />
newPurchase = InputBox("Enter the cost of a purchase:")<br />
purchCost = CSng(newPurchase)<br />
allPurchase = allPurchase + purchCost<br />
" display results<br />
MsgBox "The cost of a new purchase is: " & newPurchase<br />
MsgBox "The running cost is: " & allPurchase<br />
End Sub<br />
</source><br />
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==Understanding Module-Level Variables==<br />
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<!-- start source code --><br />
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<source lang="vb"><br />
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Sub ExpenseRep()<br />
Dim slsPrice As Currency<br />
Dim cost As Currency<br />
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slsPrice = 55.99<br />
cost = slsPrice + (slsPrice * slsTax)<br />
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MsgBox slsTax<br />
MsgBox cost<br />
End Sub<br />
</source></div>
Admin