diff --git a/rdpClient.go b/client/rdpClient.go
similarity index 98%
rename from rdpClient.go
rename to client/rdpClient.go
index ff58aea..7ea3d67 100644
--- a/rdpClient.go
+++ b/client/rdpClient.go
@@ -1,4 +1,4 @@
-package main
+package client
 
 import (
 	"ShotRDP/common"
@@ -181,7 +181,7 @@ func (client *RdpClient) setEventHandler() {
 去除requestedProtocol中的PROTOCOL_HYBRID，避免使用NLA
 */
 
-func getScreen(host string) ([]byte, error) {
+func RealGetScreen(host string) ([]byte, error) {
 	client := Newclient(host, glog.INFO)
 	return client.Login("", "", "")
 }
diff --git a/rdpClient_test.go b/client/rdpClient_test.go
similarity index 95%
rename from rdpClient_test.go
rename to client/rdpClient_test.go
index e18f237..dba74a6 100644
--- a/rdpClient_test.go
+++ b/client/rdpClient_test.go
@@ -1,4 +1,4 @@
-package main
+package client
 
 import (
 	"testing"
diff --git a/mainDLL.go b/mainDLL.go
new file mode 100644
index 0000000..981c95f
--- /dev/null
+++ b/mainDLL.go
@@ -0,0 +1,29 @@
+package main
+
+/*
+#include <stdlib.h>
+*/
+import "C"
+import (
+	"ShotRDP/client"
+	"unsafe"
+)
+
+//export GetScreen
+func GetScreen(host *C.char, data **C.char, length *C.int) *C.char {
+	imgBytes, err := client.RealGetScreen(C.GoString(host))
+	if err != nil {
+		return C.CString(err.Error())
+	}
+
+	*data = (*C.char)(C.CBytes(imgBytes))
+	*length = C.int(len(imgBytes))
+	return nil
+}
+
+//export Free
+func Free(p *C.char) {
+	C.free(unsafe.Pointer(p))
+}
+
+func main() {}
diff --git a/main.go b/mainRPC.go
similarity index 87%
rename from main.go
rename to mainRPC.go
index a9066ed..f912ded 100644
--- a/main.go
+++ b/mainRPC.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"ShotRDP/client"
 	"context"
 	"google.golang.org/grpc"
 	"net"
@@ -13,7 +14,7 @@ type Server struct {
 }
 
 func (server *Server) GetScreen(ctx context.Context, in *pb.Request) (*pb.Response, error) {
-	imgBytes, err := getScreen(in.GetHost())
+	imgBytes, err := client.RealGetScreen(in.GetHost())
 	return &pb.Response{ImageBytes: imgBytes}, err
 }