diff --git a/misc/libopenblt_jni/readme.md b/misc/libopenblt_jni/readme.md
new file mode 100644
index 0000000000..5ce048cb4e
--- /dev/null
+++ b/misc/libopenblt_jni/readme.md
@@ -0,0 +1,8 @@
+
+add into path:
+
+c:\Program Files\Microsoft Visual Studio\2022\Community\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin
+c:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Current\Bin
+
+cmake .
+msbuild OpenBLTJni.sln