This example uses the Option Explicit statement to force explicit declaration of all variables. Attempting to use an undeclared variable causes an error at compile time. The Option Explicit statement is used at the module level only. VB 复制 Option Explicit ' Force explicit variable declaration. ...
In many programming languages, you can assign a value to the variable in the same statement that you use to declare it. In VBA, declaring VBA variables is optional, but you can’t declare AND set the variable at the same time. Instead, you’ll need tocreate a new line that assigns a...
[Public|Private]DeclareSubnameLib"libname" [Alias"aliasname" ] [ ( [arglist] ) ] Syntax 2 [Public|Private]DeclareFunctionnameLib"libname" [Alias"aliasname" ] [ ( [arglist] ) ] [Astype] VBA7Declarestatement syntax Note For code to run in 64-bit versions of Microsoft Office, allDeclar...
' Declare MyObject as Variant data type.DimMyObject' Declare MyObject as Object data type.DimMyObjectAsObject' Declare MyObject as Font type.DimMyObjectAsFont 备注 [!注释] 如果使用对象变量而不事先声明它,则对象变量的数据类型默认为Variant。
This example uses theOption Explicitstatement to force explicit declaration of all variables. Attempting to use an undeclared variable causes an error at compile time. TheOption Explicitstatement is used at the module level only. VB OptionExplicit' Force explicit variable declaration.DimMyVar' Declare...
Guide to VBA Variable Declaration. Here we understand how to declare variable in VBA and when to use it with examples & download template
[Public|Private]DeclareSubnameLib"libname" [Alias"aliasname" ] [ ( [arglist] ) ] Syntax 2 [Public|Private]DeclareFunctionnameLib"libname" [Alias"aliasname" ] [ ( [arglist] ) ] [Astype] VBA7Declarestatement syntax Note For code to run in 64-bit versions of Microsoft Office, allDeclar...
Variables declared withDimat themodule levelare available to all procedures within themodule. At theprocedure level, variables are available only within the procedure. Use theDimstatement at the module or procedure level to declare the data type of a variable. For example, the following statement ...
All local variables are automatically initialised to a Default Value when they are declared.Once a variable has been declared, changing the value later means Assigning a new value.Unlike a lot of other programming languages you cannot declare and initialise on the same line. Declare and Initialise...
You can force yourself to declare all variables by usingOption Explicitstatement. In addition, avoid using theVariantdata type as much as possible because it will cost the VBA interpreter/compiler some extra steps to determine what the most appropriate data type should be used!