MQL4参考普通函数 TranslateKey

TranslateKey

Returns a Unicode character by a virtual key code considering the current input language and the status of control keys.

short  TranslateKey(
   int  key_code      // key code for receiving a Unicode character
   );

Parameters

key_code

[in] Key code.

Return Value

Unicode character in case of a successful conversion. The function returns -1 in case of an error.

Note

The function uses ToUnicodeEx to convert keys pressed by a user into Unicode characters. An error may occur in case ToUnicodeEx is not triggered –C for example, when trying to receive the SHIFT key character.

Example:

void OnChartEvent(const int id,const long& lparam,const double& dparam,const string& sparam)
  {
   if(id==CHARTEVENT_KEYDOWN)
     {
      short sym=TranslateKey((int)lparam);
      //--- if the entered character is successfully converted to Unicode
      if(sym>0)
         Print(sym,"'",ShortToString(sym),"'");
      else
         Print("Error in TranslateKey for key=",lparam);
     }
  }