使用syscall调用
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package mainimport ( "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")} |
补充：go 调用windows dll 的三种方法
第三种方法是从Go\src\internal\syscall\windows\sysdll源码中找到的，三种方法的具体区别还不是很明晰，
初步判断：lazy应该是相当于动态库，其余两种直接把库加载到内存。
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package mainimport( "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 ( 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))} // windows下的第三种DLL方法调用func ShowMessage3(title, text string) { user32,_ := syscall.LoadDLL("user32.dll") MessageBoxW,_ := user32.FindProc("MessageBoxW") MessageBoxW.Call(IntPtr(0), StrPtr(text), StrPtr(title), IntPtr(0))} func main() { defer syscall.FreeLibrary(user32) num := MessageBox("Done Title", "This test is Done.", MB_YESNOCANCEL) fmt.Printf("Get Retrun Value Before MessageBox Invoked: %d\n", num) ShowMessage2("windows下的另一种DLL方法调用", "HELLO !") ShowMessage3("windows下的第三种DLL方法调用", "lyslyslys !") time.Sleep(3 * time.Second)} func init() { fmt.Print("Starting Up\n")} |
以上为个人经验，希望能给大家一个参考，也希望大家多多支持服务器之家。如有错误或未考虑完全的地方，望不吝赐教。
原文链接：https://blog.csdn.net/xuduorui/article/details/78943331
