diff -r 2ec781e51f36 -r e6c103ebb155 pinvoke-interop-assistant-input.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pinvoke-interop-assistant-input.c	Sat Feb 14 22:11:36 2015 +0100
@@ -0,0 +1,141 @@
+
+typedef USHORT USAGE, *PUSAGE;
+typedef LONG NTSTATUS;
+
+typedef struct _HIDP_PREPARSED_DATA * PHIDP_PREPARSED_DATA;
+
+typedef enum _HIDP_REPORT_TYPE
+{
+    HidP_Input,
+    HidP_Output,
+    HidP_Feature
+} HIDP_REPORT_TYPE;
+
+typedef struct _HIDP_CAPS
+{
+    USAGE    Usage;
+    USAGE    UsagePage;
+    USHORT   InputReportByteLength;
+    USHORT   OutputReportByteLength;
+    USHORT   FeatureReportByteLength;
+    USHORT   Reserved[17];
+
+    USHORT   NumberLinkCollectionNodes;
+
+    USHORT   NumberInputButtonCaps;
+    USHORT   NumberInputValueCaps;
+    USHORT   NumberInputDataIndices;
+
+    USHORT   NumberOutputButtonCaps;
+    USHORT   NumberOutputValueCaps;
+    USHORT   NumberOutputDataIndices;
+
+    USHORT   NumberFeatureButtonCaps;
+    USHORT   NumberFeatureValueCaps;
+    USHORT   NumberFeatureDataIndices;
+} HIDP_CAPS, *PHIDP_CAPS;
+
+
+typedef struct _HIDP_BUTTON_CAPS
+{
+    USAGE    UsagePage;
+    UCHAR    ReportID;
+    BOOLEAN  IsAlias;
+
+    USHORT   BitField;
+    USHORT   LinkCollection;   // A unique internal index pointer
+
+    USAGE    LinkUsage;
+    USAGE    LinkUsagePage;
+
+    BOOLEAN  IsRange;
+    BOOLEAN  IsStringRange;
+    BOOLEAN  IsDesignatorRange;
+    BOOLEAN  IsAbsolute;
+
+    ULONG    Reserved[10];
+    union {
+        struct {
+            USAGE    UsageMin,         UsageMax;
+            USHORT   StringMin,        StringMax;
+            USHORT   DesignatorMin,    DesignatorMax;
+            USHORT   DataIndexMin,     DataIndexMax;
+        } Range;
+        struct  {
+            USAGE    Usage,            Reserved1;
+            USHORT   StringIndex,      Reserved2;
+            USHORT   DesignatorIndex,  Reserved3;
+            USHORT   DataIndex,        Reserved4;
+        } NotRange;
+    };
+
+} HIDP_BUTTON_CAPS, *PHIDP_BUTTON_CAPS;
+
+typedef struct _HIDP_VALUE_CAPS
+{
+    USAGE    UsagePage;
+    UCHAR    ReportID;
+    BOOLEAN  IsAlias;
+
+    USHORT   BitField;
+    USHORT   LinkCollection;   // A unique internal index pointer
+
+    USAGE    LinkUsage;
+    USAGE    LinkUsagePage;
+
+    BOOLEAN  IsRange;
+    BOOLEAN  IsStringRange;
+    BOOLEAN  IsDesignatorRange;
+    BOOLEAN  IsAbsolute;
+
+    BOOLEAN  HasNull;        // Does this channel have a null report   union
+    UCHAR    Reserved;
+    USHORT   BitSize;        // How many bits are devoted to this value?
+
+    USHORT   ReportCount;    // See Note below.  Usually set to 1.
+    USHORT   Reserved2[5];
+
+    ULONG    UnitsExp;
+    ULONG    Units;
+
+    LONG     LogicalMin,       LogicalMax;
+    LONG     PhysicalMin,      PhysicalMax;
+
+    union {
+        struct {
+            USAGE    UsageMin,         UsageMax;
+            USHORT   StringMin,        StringMax;
+            USHORT   DesignatorMin,    DesignatorMax;
+            USHORT   DataIndexMin,     DataIndexMax;
+        } Range;
+
+        struct {
+            USAGE    Usage,            Reserved1;
+            USHORT   StringIndex,      Reserved2;
+            USHORT   DesignatorIndex,  Reserved3;
+            USHORT   DataIndex,        Reserved4;
+        } NotRange;
+    };
+} HIDP_VALUE_CAPS, *PHIDP_VALUE_CAPS;
+
+NTSTATUS __stdcall
+HidP_GetCaps (
+         PHIDP_PREPARSED_DATA      PreparsedData,
+        PHIDP_CAPS                Capabilities
+   );
+
+   NTSTATUS __stdcall
+HidP_GetButtonCaps (
+          HIDP_REPORT_TYPE     ReportType,
+   PHIDP_BUTTON_CAPS ButtonCaps,
+       PUSHORT              ButtonCapsLength,
+          PHIDP_PREPARSED_DATA PreparsedData
+);
+
+NTSTATUS __stdcall
+HidP_GetValueCaps (
+          HIDP_REPORT_TYPE     ReportType,
+   PHIDP_VALUE_CAPS ValueCaps,
+       PUSHORT              ValueCapsLength,
+          PHIDP_PREPARSED_DATA PreparsedData
+);