[SHELL32] shlexec: Initial support of App Paths (#4850)

- Fix SHELL_TryAppPathW helper function by using SHRegQueryValueExW function.
- Fix SHRegQueryValueExA/W functions.
CORE-11335

dll/win32/shell32/shlexec.cpp

@@ -593,7 +593,6 @@ static LPWSTR SHELL_BuildEnvW( const WCHAR *path )
     return new_env;
 }
 
-
 /***********************************************************************
  *           SHELL_TryAppPathW    [Internal]
  *
@@ -604,9 +603,9 @@ static LPWSTR SHELL_BuildEnvW( const WCHAR *path )
  */
 static BOOL SHELL_TryAppPathW( LPCWSTR szName, LPWSTR lpResult, WCHAR **env)
 {
-    HKEY hkApp = 0;
+    HKEY hkApp = NULL;
     WCHAR buffer[1024];
-    LONG len;
+    DWORD len, dwType;
     LONG res;
     BOOL found = FALSE;
 
@@ -625,14 +624,17 @@ static BOOL SHELL_TryAppPathW( LPCWSTR szName, LPWSTR lpResult, WCHAR **env)
     }
 
     len = MAX_PATH * sizeof(WCHAR);
-    res = RegQueryValueW(hkApp, NULL, lpResult, &len);
-    if (res) goto end;
+    res = SHRegQueryValueExW(hkApp, NULL, NULL, &dwType, (LPBYTE)lpResult, &len);
+    if (res != ERROR_SUCCESS || dwType != REG_SZ)
+        goto end;
+
     found = TRUE;
 
     if (env)
     {
-        DWORD count = sizeof(buffer);
-        if (!RegQueryValueExW(hkApp, L"Path", NULL, NULL, (LPBYTE)buffer, &count) && buffer[0])
+        len = sizeof(buffer);
+        res = SHRegQueryValueExW(hkApp, L"Path", NULL, &dwType, (LPBYTE)buffer, &len);
+        if (res == ERROR_SUCCESS && dwType == REG_SZ && buffer[0])
             *env = SHELL_BuildEnvW(buffer);
     }
 

dll/win32/shell32/wine/shellreg.c

@@ -28,6 +28,7 @@
 #include <windef.h>
 #include <winbase.h>
 #include <shlobj.h>
+#include <shlwapi.h>
 
 #include <wine/debug.h>
 
@@ -73,16 +74,16 @@ HRESULT WINAPI SHRegQueryValueA(HKEY hkey, LPSTR lpSubKey, LPSTR lpValue, LPDWOR
  * SHRegQueryValueExA   [SHELL32.509]
  *
  */
-HRESULT WINAPI SHRegQueryValueExA(
+LONG WINAPI SHRegQueryValueExA(
 	HKEY hkey,
-	LPSTR lpValueName,
+	LPCSTR lpValueName,
 	LPDWORD lpReserved,
 	LPDWORD lpType,
 	LPBYTE lpData,
 	LPDWORD lpcbData)
 {
 	TRACE("%p %s %p %p %p %p\n", hkey, lpValueName, lpReserved, lpType, lpData, lpcbData);
-	return RegQueryValueExA (hkey, lpValueName, lpReserved, lpType, lpData, lpcbData);
+	return SHQueryValueExA(hkey, lpValueName, lpReserved, lpType, lpData, lpcbData);
 }
 
 /*************************************************************************
@@ -102,24 +103,18 @@ HRESULT WINAPI SHRegQueryValueW(
 
 /*************************************************************************
  * SHRegQueryValueExW	[SHELL32.511] NT4.0
- *
- * FIXME
- *  if the datatype REG_EXPAND_SZ then expand the string and change
- *  *pdwType to REG_SZ.
  */
-HRESULT WINAPI SHRegQueryValueExW (
+LONG WINAPI SHRegQueryValueExW(
 	HKEY hkey,
-	LPWSTR pszValue,
+	LPCWSTR pszValue,
 	LPDWORD pdwReserved,
 	LPDWORD pdwType,
 	LPVOID pvData,
 	LPDWORD pcbData)
 {
-	DWORD ret;
-	WARN("%p %s %p %p %p %p semi-stub\n",
+	TRACE("%p %s %p %p %p %p\n",
 		hkey, debugstr_w(pszValue), pdwReserved, pdwType, pvData, pcbData);
-	ret = RegQueryValueExW ( hkey, pszValue, pdwReserved, pdwType, pvData, pcbData);
-	return ret;
+	return SHQueryValueExW(hkey, pszValue, pdwReserved, pdwType, pvData, pcbData);
 }
 
 /*************************************************************************

sdk/include/reactos/undocshell.h

@@ -721,6 +721,26 @@ IStream* WINAPI SHGetViewStream(LPCITEMIDLIST, DWORD, LPCTSTR, LPCTSTR, LPCTSTR)
 
 EXTERN_C HRESULT WINAPI SHCreateSessionKey(REGSAM samDesired, PHKEY phKey);
 
+LONG WINAPI SHRegQueryValueExA(
+    HKEY hkey,
+    LPCSTR lpValueName,
+    LPDWORD lpReserved,
+    LPDWORD lpType,
+    LPBYTE lpData,
+    LPDWORD lpcbData);
+LONG WINAPI SHRegQueryValueExW(
+    HKEY hkey,
+    LPCWSTR pszValue,
+    LPDWORD pdwReserved,
+    LPDWORD pdwType,
+    LPVOID pvData,
+    LPDWORD pcbData);
+#ifdef UNICODE
+    #define SHRegQueryValueEx SHRegQueryValueExW
+#else
+    #define SHRegQueryValueEx SHRegQueryValueExA
+#endif
+
 /*****************************************************************************
  * INVALID_FILETITLE_CHARACTERS
  */