Golang调用windows下的dll动态库中的函数

时间:2023-03-08 16:00:54
Golang调用windows下的dll动态库中的函数

Golang调用windows下的dll动态库中的函数 
使用syscall调用。

package main

import (
"fmt"
"syscall"
"time"
"unsafe"
) const (
MB_OK = 0x00000000
MB_OKCANCEL = 0x00000001
MB_ABORTRETRYIGNORE = 0x00000002
MB_YESNOCANCEL = 0x00000003
MB_YESNO = 0x00000004
MB_RETRYCANCEL = 0x00000005
MB_CANCELTRYCONTINUE = 0x00000006
MB_ICONHAND = 0x00000010
MB_ICONQUESTION = 0x00000020
MB_ICONEXCLAMATION = 0x00000030
MB_ICONASTERISK = 0x00000040
MB_USERICON = 0x00000080
MB_ICONWARNING = MB_ICONEXCLAMATION
MB_ICONERROR = MB_ICONHAND
MB_ICONINFORMATION = MB_ICONASTERISK
MB_ICONSTOP = MB_ICONHAND MB_DEFBUTTON1 = 0x00000000
MB_DEFBUTTON2 = 0x00000100
MB_DEFBUTTON3 = 0x00000200
MB_DEFBUTTON4 = 0x00000300
) func abort(funcname string, err syscall.Errno) {
panic(funcname + " failed: " + err.Error())
} var (
// kernel32, _ = syscall.LoadLibrary("kernel32.dll")
// getModuleHandle, _ = syscall.GetProcAddress(kernel32, "GetModuleHandleW") user32, _ = syscall.LoadLibrary("user32.dll")
messageBox, _ = syscall.GetProcAddress(user32, "MessageBoxW")
) func IntPtr(n int) uintptr {
return uintptr(n)
} func StrPtr(s string) uintptr {
return uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(s)))
} func MessageBox(caption, text string, style uintptr) (result int) {
ret, _, callErr := syscall.Syscall9(messageBox,
4,
0,
StrPtr(text),
StrPtr(caption),
style,
0, 0, 0, 0, 0)
if callErr != 0 {
abort("Call MessageBox", callErr)
}
result = int(ret)
return
} //func GetModuleHandle() (handle uintptr) {
// if ret, _, callErr := syscall.Syscall(getModuleHandle, 0, 0, 0, 0); callErr != 0 {
// abort("Call GetModuleHandle", callErr)
// } else {
// handle = ret
// }
// return
//} // windows下的第二种DLL方法调用
func ShowMessage2(title, text string) {
user32 := syscall.NewLazyDLL("user32.dll")
MessageBoxW := user32.NewProc("MessageBoxW")
MessageBoxW.Call(IntPtr(0), StrPtr(text), StrPtr(title), IntPtr(0))
} func main() {
// defer syscall.FreeLibrary(kernel32)
defer syscall.FreeLibrary(user32) //fmt.Printf("Retern: %d\n", MessageBox("Done Title", "This test is Done.", MB_YESNOCANCEL))
num := MessageBox("Done Title", "This test is Done.", MB_YESNOCANCEL)
fmt.Printf("Get Retrun Value Before MessageBox Invoked: %d\n", num)
ShowMessage2("windows下的第二种DLL方法调用", "HELLO !")
time.Sleep(3 * time.Second)
} func init() {
fmt.Print("Starting Up\n")
}
package main

import "syscall"

func main() {
// test.dll
// int add(int x, int y) h, err := syscall.LoadLibrary("test.dll")
if (err != nil){
panic(err.Error())
}
defer syscall.FreeLibrary(h)
proc, err := syscall.GetProcAddress(h, "add")
if (err != nil) {
panic(err.Error())
}
r, _, _ := syscall.Syscall(uintptr(proc), 2, 1, 1, 0)
println("r=", r) dll := syscall.NewLazyDLL("test.dll")
add := dll.NewProc("add")
ret, _, _ := add.Call(uintptr(1), uintptr(1))
println("1+1=", ret)
}