Plugin API: Add RmReplaceVariables function

Plugins/API/RainmeterAPI.cs

@@ -44,6 +44,9 @@ namespace Rainmeter
         [DllImport("Rainmeter.dll", CharSet = CharSet.Auto)]
         private extern static unsafe double RmReadFormula(void* rm, char* option, double defValue);
 
+        [DllImport("Rainmeter.dll", CharSet = CharSet.Auto)]
+        private extern static unsafe char* RmReplaceVariables(void* rm, char* str);
+
         [DllImport("Rainmeter.dll", CharSet = CharSet.Auto)]
         private extern static unsafe char* RmPathToAbsolute(void* rm, char* relativePath);
 
@@ -87,6 +90,12 @@ namespace Rainmeter
             return (int)RmReadFormula((void*)m_Rm, ToUnsafe(option), defValue);
         }
 
+        public unsafe string ReplaceVariables(string str)
+        {
+            char* value = RmReplaceVariables((void*)m_Rm, ToUnsafe(str));
+            return new string(value);
+        }
+
         public unsafe string GetMeasureName()
         {
             char* value = (char*)RmGet((void*)m_Rm, 0);

Plugins/API/RainmeterAPI.h

@@ -39,6 +39,8 @@ LIBRARY_EXPORT LPCWSTR __stdcall RmReadString(void* rm, LPCWSTR option, LPCWSTR
 
 LIBRARY_EXPORT double __stdcall RmReadFormula(void* rm, LPCWSTR option, double defValue);
 
+LIBRARY_EXPORT LPCWSTR __stdcall RmReplaceVariables(void* rm, LPCWSTR str);
+
 LIBRARY_EXPORT LPCWSTR __stdcall RmPathToAbsolute(void* rm, LPCWSTR relativePath);
 
 LIBRARY_EXPORT void __stdcall RmExecute(void* skin, LPCWSTR command);