src/cmd/go/testdata/script/ws2_32.txt

[!GOOS:windows] skip

go run .
stdout 'ws2_32.dll: not found'

go run -tags net .
stdout 'ws2_32.dll: found'

-- go.mod --
module m

go 1.21

-- utils.go --
package main

import (
	"fmt"
	"syscall"
	"unsafe"
)

func hasModuleHandle() {
	const ws2_32 = "ws2_32.dll"
	getModuleHandle := syscall.MustLoadDLL("kernel32.dll").MustFindProc("GetModuleHandleW")
	mod, _, _ := getModuleHandle.Call(uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(ws2_32))))
	if mod != 0 {
		fmt.Println(ws2_32+":", "found")
	} else {
		fmt.Println(ws2_32+":", "not found")
	}
}
-- net.go --
//go:build net
package main

import _ "net"

func main() {
    hasModuleHandle()
}
-- nonet.go --
//go:build !net
package main

func main() {
    hasModuleHandle()
}