基本适应win7,win10,win server 08,win server 12,win server 16的截图

grdp/win/win_nonwindows.go

@@ -0,0 +1,12 @@
+// +build !windows
+
+package win
+
+import (
+	"syscall"
+)
+
+func syscall3(trap, nargs, a1, a2, a3 uintptr) uintptr {
+	ret, _, _ := syscall.Syscall(trap, a1, a2, a3)
+	return ret
+}