如果呼叫程式碼未提供 level 參數的值,Visual Basic 會將它設定為預設值 0。 如果類型檢查參數 (Option Strict 陳述式)為 Off ,則當您定義參數時,As 子句是選擇性的。 不過,如果有任何一個參數使用 As 子句,則所有參數都必須使用該子句。 如果類型檢查參數為 On,則每個參數定義都需要...
-define (Visual Basic)發行項 2024/03/13 12 位參與者 意見反應 本文內容 語法 引數 備註 範例 另請參閱 定義條件式編譯器常數。語法主控台 複製 -define:["]symbol[=value][,symbol[=value]]["] 或主控台 複製 -d:["]symbol[=value][,symbol[=value]]["] ...
Similarly, you should declare a variable to be Static only when it is necessary to preserve its value between procedure calls. See also Declared Element Characteristics How to: Control the Scope of a Variable Lifetime in Visual Basic Access levels in Visual Basic References to Declared Elements ...
TheAsclause in the declaration statement allows you to define the data type or object type of the variable you are declaring. You can specify any of the following types for a variable: An elementary data type, such asBoolean,Long, orDecimal ...
Visual Basic 中的程序 如何:建立程序 子程序 函式程序 屬性程序 運算子程序 運算子程序 如何:定義運算子 如何:定義轉換運算子 如何:呼叫運算子程序 如何:使用定義運算子的類別 程序參數和引數 參考傳回值 遞迴程序 程序多載 針對程序進行疑難排解 擴充方法 ...
Microsoft Visual Basic Enterprise Edition for Windows, versions 5.0, 6.0 摘要 很少有vb程序员需要获得一个变量的低级信息,例如内存地址。然而,一些API函数需要这种 信息,本文描述的方法可以帮助VB程序员取得这些信息 VarPtr - Returns the address of a variable.返回变量的地址 ...
You can define variables in the declarations section of a module (at the top of a module, above all sub procedures), and set the scope of your variable by using the Public statement, the Dim statement, or the Private statement. If you put the...
' Vbc /define:DEBUGMODE=True,TRAPERRORS=False test.vb Sub mysub() #If debugmode Then ' Insert debug statements here. MsgBox("debug mode") #Else ' Insert default statements here. #End If End Sub 請參閱 參考 #If...Then...#Else 指示詞 #Const 指示詞 編譯命令列範例 (Visual Basic) ...
Use care when you define variables with the same name but different scope, because doing so can lead to unexpected results. For more information, see References to Declared Elements (Visual Basic). Levels of Scope A programming element is available throughout the region in which you declare it...
CRT_Dbg1Illustrates the basic debugging features of the C run-time libraries. CRT_Dbg2Demonstrates the C runtime debugging hook functions. DFACObjsShows how to use the _CrtDoForAllClientObjects C run-time function to iterate through a linked list of client objects. ...