如何使用rundll32.exe从批处理中创建可调用的DLL [英] How to create a DLL callable from batch using rundll32.exe

问题描述

使用rundll32，可以将简单的API调用到DLL中.

With rundll32 it is possible to call simple APIs into DLLs.

两个问题:

• 为此用途，入口点应该使用 __ cdecl 调用约定还是其他调用约定?
• 是否可以仅传递数字参数或字符串?

• for this usage, should be the entry point use the __cdecl calling convention, or some other calling convention?
• is it possible to pass only numeric args or also strings?

推荐答案

请勿使用 rundll32.exe .我说不出比Raymond Chen更好的话:有关的指导是什么什么时候使用rundll32?容易:不使用它.

Don't use rundll32.exe. I can't word it any better than Raymond Chen did: What’s the guidance on when to use rundll32? Easy: Don’t use it.

如果您通读了博客条目，并且仍然确信这是您需要的解决方案，请参见交易:入口点必须遵循 __ stdcall 调用约定:

If you read through the blog entry, and are still convinced, that this is the solution you need, here is the deal: The entry point must follow the __stdcall calling convention:

void CALLBACK
EntryPointW(HWND hwnd, HINSTANCE hinst, LPWSTR lpszCmdLine, int nCmdShow);

尾随的 W 很重要，因此 lpszCmdLine 参数作为Unicode(UTF-16LE)传递. EntryPoint 是一个占位符，可以是任何合法符号.

The trailing W is important, so that the lpszCmdLine argument is passed as Unicode (UTF-16LE). EntryPoint is a placeholder, it can be any legal symbol.

作为示例，您可以导出名为 MyFunctionW 的符号，并使用以下命令传递任意命令行:

As an example, you can export a symbol called MyFunctionW, and pass an arbitrary command line using:

rundll32.exe MyDll.dll,MyFunction 132 C:\WINDOWS\INF\SHELL.INF

但是，实际上，您应该评估其他选项(例如 PowerShell ).便利并非免费提供.

But really, you should evaluate other options (e.g. PowerShell). Convenience doesn't come for free.

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