diff --git a/windows-snapshot-tool/src/main.cpp b/windows-snapshot-tool/src/main.cpp
index 2ec8a3c..7cca15a 100644
--- a/windows-snapshot-tool/src/main.cpp
+++ b/windows-snapshot-tool/src/main.cpp
@@ -516,6 +516,7 @@ int GetEncoderClsid(const WCHAR* format, CLSID* pClsid)
 /** Save compressed picture
  *
  * https://stackoverflow.com/questions/997175/how-can-i-take-a-screenshot-and-save-it-as-jpeg-on-windows
+ * https://docs.microsoft.com/en-us/windows/desktop/gdiplus/-gdiplus-converting-a-bmp-image-to-a-png-image-use
  */
 void SaveJpeg(HBITMAP hBmp, LPCWSTR lpszFilename, ULONG uQuality)
 {