Windows 7 安装程序，刷新路径环境变量 [英] Windows 7 install program, refresh path environment variable

问题描述

我有一个适用于我的应用程序的 MSI 安装程序，它会向路径环境变量中写入一些内容，但在我重新启动或手动进入环境变量并单击确定"之前不会在 Windows 中刷新".

I have an MSI install program for my application, that writes something to the path environment variable, but is is not "refreshed" in Windows until I reboot or manually go into environment variables and click ok.

我的客户要求我们解决这个问题.

My client has requested that we fix this.

安装程序有限，但我可以选择在安装完成后运行批处理文件或 VBScript.

The install program is limited but I have the option to run a batch file or VBScript after installation is finished.

有人知道我可以使用的命令或函数吗?

Anybody know if there is a command or a function I can use?

推荐答案

如果重启不是一个选项，你可以尝试杀死 explorer.exe 的每个实例，但我认为这也是不可接受的.

If restart is not an option, you can try to kill every instance of explorer.exe, but i think this will also be not acceptable.

正确的做法是向所有最顶层的窗口发送消息以通知环境中的变化.但我不知道操作系统中有什么可以做到这一点.如果您可以包含一个 exe 并可以访问 c 编译器，这应该可以解决问题

The correct way of doing it is sending a message to all top most windows to notificate of changes in the environment. But i don't know anything in the OS to do that. If you can include an exe and have access to a c compiler, this should do the trick

#include "windows.h"

void main(void) {
    SendMessageTimeout(
        HWND_BROADCAST,
        WM_SETTINGCHANGE,
        (WPARAM) NULL,
        (LPARAM) "Environment",
        SMTO_NORMAL,
        1000,
        NULL
    );
}

我已经尝试在 Windows 7 64 中使用 mingw/gcc 编译它，似乎没有问题.

I've tried compiling it with mingw/gcc in Windows 7 64 and seems to work without problems.

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