How Can I Access DLL Functions in Go Without DllImport?

Accessing DLL Functions with Go: An Alternative to DllImport

If you're accustomed to using DllImport in C#, you may be wondering if there's an equivalent technique for importing functions from DLLs in Go. While Go doesn't have a direct DllImport equivalent, there are several approaches you can employ.

cgo Method

This approach allows you to call DLL functions directly from Go code. Below is a simplified example:

import ("C")

func main() {
    C.SomeDllFunc(...) // Call the DLL function
}

syscall Method

The syscall package also provides a means to access DLL functions. Here's an example using the GetModuleHandle function from the kernel32.dll library:

import (
    "syscall"
    "unsafe"
)

// ...

kernel32, _ := syscall.LoadLibrary("kernel32.dll")
getModuleHandle, _ := syscall.GetProcAddress(kernel32, "GetModuleHandleW")

func GetModuleHandle() (handle uintptr) {
    // ...
    return
}

Third-Party Packages

Additionally, there are third-party packages like github.com/golang/go/wiki/WindowsDLLs that offer assistance in working with DLLs in Go.

Conclusion

While there is no direct DllImport equivalent in Go, the cgo, syscall, and third-party package approaches provide flexible ways to access DLL functions within your Go applications.

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