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-rw-r--r--docs/examples/ftpupload.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/docs/examples/ftpupload.c b/docs/examples/ftpupload.c
index e69ec2d00..68b86fdf4 100644
--- a/docs/examples/ftpupload.c
+++ b/docs/examples/ftpupload.c
@@ -72,6 +72,12 @@ int main(int argc, char **argv)
/* now specify which file to upload */
curl_easy_setopt(curl, CURLOPT_READDATA, hd_src);
+ /* NOTE: if you want this example to work on Windows with libcurl as a
+ DLL, you MUST also provide a read callback with
+ CURLOPT_READFUNCTION. Failing to do so will give you a crash since a
+ DLL may not use the variable's memory when passed in to it from an app
+ like this. */
+
/* and give the size of the upload (optional) */
curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE, file_info.st_size);