NSIS: What is a registry?

What is a registry in NSIS? How do you write to 开发者_运维技巧and read from a registry?

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You mean the Windows Registry, which you are able to modify with NSIS?

In this case, this article may help you to clarify something: What is the Windows Registry?

After that, you are able to understand and use the NSIS-Commands

WriteRegStr
ReadRegStr

A detailed example can be found here: ReadRegStr and here: WriteRegStr

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Or, you might be referring to the NSIS Registers which are standard variables used by some functions and plug-ins to pass or return values.

From the NSIS Scripting Reference section 4.2.2:

$0, $1, $2, $3, $4, $5, $6, $7, $8, $9, $R0, $R1, $R2, $R3, $R4, $R5, $R6, $R7, $R8, $R9

Registers. These variables can be used just like user variables, but are usually used in shared functions or macros. You don't have to declare these variables, so you won't get any name conflicts when using them in shared code. When using these variables in shared code, it's recommended that you use the stack to save and restore their original values. These variables can also be used for communication with plug-ins, because they can be read and written by the plug-in DLLs.

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It's the Windows registry. An example on reading and writing it from NSIS is the first result here