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) }