diff --git a/reactos/w32api/include/wincrypt.h b/reactos/w32api/include/wincrypt.h
index c3ebf2d5d00..474a48a0f55 100644
--- a/reactos/w32api/include/wincrypt.h
+++ b/reactos/w32api/include/wincrypt.h
@@ -136,6 +136,11 @@ extern "C" {
 #define CRYPT_READ 8
 #define CRYPT_WRITE 16
 #define CRYPT_MAC 32
+/* Crypt{Get|Set}Provider */
+#define CRYPT_MACHINE_DEFAULT     0x00000001
+#define CRYPT_USER_DEFAULT        0x00000002
+#define CRYPT_DELETE_DEFAULT      0x00000004
+
 #define HP_ALGID 1
 #define HP_HASHVAL 2
 #define HP_HASHSIZE 4
@@ -143,6 +148,7 @@ extern "C" {
 #define CRYPT_SUCCEED TRUE
 #define RCRYPT_SUCCEEDED(r) ((r)==CRYPT_SUCCEED)
 #define RCRYPT_FAILED(r) ((r)==CRYPT_FAILED)
+#define PP_CLIENT_HWND 1
 #define PP_ENUMALGS 1
 #define PP_ENUMCONTAINERS 2
 #define PP_IMPTYPE 3
@@ -349,7 +355,15 @@ extern "C" {
 #define INTERNATIONAL_USAGE 0x00000001
 
 typedef UINT ALG_ID;
-typedef struct _VTableProvStruc {FARPROC FuncVerifyImage;} VTableProvStruc,*PVTableProvStruc;
+typedef struct _VTableProvStruc {
+    DWORD    Version;
+    FARPROC  pFuncVerifyImage;
+    FARPROC  pFuncReturnhWnd;
+    DWORD    dwProvType;
+    BYTE    *pbContextInfo;
+    DWORD    cbContextInfo;
+    LPSTR    pszProvName;
+} VTableProvStruc, *PVTableProvStruc;
 typedef ULONG HCRYPTPROV;
 typedef ULONG HCRYPTKEY;
 typedef ULONG HCRYPTHASH;
@@ -649,7 +663,8 @@ BOOL WINAPI CryptVerifySignatureA(HCRYPTHASH,PBYTE,DWORD,HCRYPTKEY,LPCSTR,DWORD)
 BOOL WINAPI CryptVerifySignatureW(HCRYPTHASH,PBYTE,DWORD,HCRYPTKEY,LPCWSTR,DWORD);
 BOOL WINAPI CryptSetProviderA(LPCSTR,DWORD);
 BOOL WINAPI CryptSetProviderW(LPCWSTR,DWORD);
-
+BOOL WINAPI CryptSetProviderExA(LPCSTR,DWORD,DWORD*,DWORD);
+BOOL WINAPI CryptSetProviderExW(LPCWSTR,DWORD,DWORD*,DWORD);
 #ifdef UNICODE
 #define CertNameToStr CertNameToStrW
 #define CryptAcquireContext CryptAcquireContextW