How to use shell command in VB language
This article mainly introduces how to use shell command in VB language, which is very detailed and has certain reference value. Friends who are interested must finish reading it.
The interface is as follows:
Review some important symbols in common use
Common symbols in VB programming:
When using this symbol, pay attention to adding a space before and after it, which is often used for the connection between strings.
This symbol is composed of less than sign and greater than sign, which indicates that it is not equal to and is often used in logical judgment.
The = symbol has two meanings and can be used in different situations, one is assignment, the other is logical judgment.
"" double quotation marks represent a string, which is used for a string type, and represents a string of text.
Single quotation marks denote comments and are often used to indicate the meaning of program code.
. The dot symbol, which stands for "of", is often used to get or set a property after a control object.
() parentheses indicate the priority of execution.
A symbol used primarily for mathematical operations.
The semicolon indicates the connection string, which, when concatenated, can merge multiple lines of print output
Second, combine important shell commands
How to use the command function in VB?
Use the shell keyword command directly.
How to open a Baidu web page through a link?
Shell "explorer http://www.baidu.com"
We can also open files or folders on our local computer through explorer.
You can also open a command prompt through cmd.
III. For cycle
Use format:
For custom initialization variable to termination condition step size of the step variable
Here is the code to be executed under the condition of the loop
The variable customized by next
Practical application:
For example, open a file in batches?
For I = 1 To 5 Step 2
Shell "explorer D:\ aaa.txt"
Next i
Understand the mysteries of the loop according to the above code.
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