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复制 OptionExplicit' Force explicit variable declaration.DimMyVar' Dec...
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...
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...
At the top of your module, enterOption Explicit to force VBA to declare all variables. It can help avoid typing mistakes while writing the code using variable names that might be causing unexpected behavior while running the code. Note – You can also use a application likeMZ-Toolsto writeVB...
If you don't want Visual Basic to make implicit declarations, you can place theOption Explicitstatement in a module before any procedures. This statement requires you to explicitly declare all variables within the module. If a module includes theOption Explicitstatement, acompile-timeerror will occ...
声明变量时,通常使用Dim语句。 声明语句可以置于创建过程中以创建过程级变量。 也可以置于声明部分的模块顶部,以创建模块级变量。 下面的示例创建变量并指定String 数据类型。 VB DimstrNameAsString 如果该语句出现在某个过程中,那么只能在该过程中使用变量strName。 如果语句出现在模块的声明部分,则变量strName可用于...
In this tutorial, you learned how to declare a variable and the best place to place your variable declarations. You learned what’s allowed and not allowed when naming your variables and you discovered that it’s wise to follow a consistent naming convention for your variables. After that, yo...
\n You can force yourself to declare all variables by using Option Explicit statement.\n\n In addition, avoid using the Variant data 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!
' Function definition.FunctionKeepTotal(Number)' Only the variable Accumulate preserves its value between calls.StaticAccumulate Accumulate = Accumulate + Number KeepTotal = AccumulateEndFunction' Static function definition.StaticFunctionMyFunction(Arg1, Arg2, Arg3)' All local variables preserve value betw...
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 ...