Added some checking.

hidapi/hid.cpp

@@ -426,6 +426,15 @@ int HID_API_EXPORT hid_read(int device, unsigned char *data, size_t length)
 	// we are in non-blocking mode. Get the number of bytes read. The actual
 	// data has been copied to the data[] array which was passed to ReadFile().
 	res = GetOverlappedResult(dev->device_handle, &ol, &bytes_read, TRUE/*wait*/);
+
+	if (bytes_read > 0 && data[0] == 0x0) {
+		/* If report numbers aren't being used, but Windows sticks a report
+		   number (0x0) on the beginning of the report anyway. To make this
+		   work like the other platforms, and to make it work more like the
+		   HID spec, we'll skip over this byte. */
+		bytes_read--;
+		memmove(data, data+1, bytes_read);
+	}
 	
 end_of_function:
 	if (!res) {

hidtest/hidtest.cpp

@@ -19,7 +19,7 @@
 #include "hidapi.h"
 
 // Headers needed for sleeping.
-#ifdef WIN32
+#ifdef _WIN32
 	#include <windows.h>
 #else
 	#include <unistd.h>
@@ -28,7 +28,7 @@
 int main(int argc, char* argv[])
 {
 	int res;
-	unsigned char buf[65];
+	unsigned char buf[256];
 	#define MAX_STR 255
 	wchar_t wstr[MAX_STR];
 	int handle;
@@ -121,17 +121,18 @@ int main(int argc, char* argv[])
 	res = hid_get_feature_report(handle, buf, sizeof(buf));
 	if (res < 0) {
 		printf("Unable to get a feature report.\n");
+		printf("%s", hid_error(handle));
+	}
+	else {
+		// Print out the returned buffer.
+		printf("Feature Report\n   ");
+		for (i = 0; i < 17; i++)
+			printf("%02hhx ", buf[i]);
+		printf("\n");
 	}
 
-	// Print out the returned buffer.
-	printf("Feature Report\n   ");
-	for (i = 0; i < 17; i++)
-		printf("%02hhx ", buf[i]);
-	printf("\n");
-
 	memset(buf,0,sizeof(buf));
 
-
 	// Toggle LED (cmd 0x80). The first byte is the report number (0x1).
 	buf[0] = 0x1;
 	buf[1] = 0x80;