diff --git a/cpp/winrtutils/winrtsnapshot.cpp b/cpp/winrtutils/winrtsnapshot.cpp
index 98aa9759..ffcd5134 100644
--- a/cpp/winrtutils/winrtsnapshot.cpp
+++ b/cpp/winrtutils/winrtsnapshot.cpp
@@ -29,30 +29,21 @@ int GetEncoderClsid(const WCHAR *format, CLSID *pClsid)
 {
     UINT num = 0;  // number of image encoders
     UINT size = 0; // size of the image encoder array in bytes
-
-    Gdiplus::ImageCodecInfo *pImageCodecInfo = NULL;
-
     Gdiplus::GetImageEncodersSize(&num, &size);
     if (size == 0)
         return -1; // Failure
 
-    pImageCodecInfo = (Gdiplus::ImageCodecInfo *)(malloc(size));
-    if (pImageCodecInfo == NULL)
-        return -1; // Failure
-
-    GetImageEncoders(num, size, pImageCodecInfo);
+    auto pImageCodecInfo = std::make_unique<Gdiplus::ImageCodecInfo[]>(num);
+    GetImageEncoders(num, size, pImageCodecInfo.get());
 
     for (UINT j = 0; j < num; ++j)
     {
         if (wcscmp(pImageCodecInfo[j].MimeType, format) == 0)
         {
             *pClsid = pImageCodecInfo[j].Clsid;
-            free(pImageCodecInfo);
             return j; // Success
         }
     }
-
-    free(pImageCodecInfo);
     return -1; // Failure
 }
 void capture_window(HWND window_handle, void (*cb)(byte *, size_t))