CCy_IPC_WindowMessage_1.mqh

/*
MetaTrader5 language MQL5
- Only for 64bit environment

file : CCy_IPC_WindowMessage_1.mqh

author : igotit . https://igotit.tistory.com 
*/

#define WM_USER 0x0400 // Windows Message User 정의

#import "user32.dll"
   long FindWindowW(string lpClassName,string lpWindowName);        //HWND FindWindowW(LPCWSTR lpClassName,LPCWSTR lpWindowName); 
   long SendMessageW(long hWnd, int Msg, long wParam, long lParam); // LRESULT SendMessageW(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam);
   long PostMessageW(long hWnd, int Msg, long wParam, long lParam); // LRESULT PostMessageW(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam);
#import

class CCy_WindowMessage
{
private:
    string m_NameWndTgt;   // 대상윈도우 이름.
    int m_Msg;           // 예 : 사용자 메시지인 경우  WM_USER + 1

public: 
    CCy_WindowMessage(string name_wnd_tgt, int msg = WM_USER+1)
        :m_NameWndTgt(name_wnd_tgt), m_Msg(msg) 
    {}
    ~CCy_WindowMessage() {}

    long FindWindow()
    {
        long hwnd_tgt = FindWindowW(NULL,m_NameWndTgt); // 대상 윈도우 핸들 받기. 

        if(hwnd_tgt == 0){
            Print("[CCy_WindowMessage] Not Found Target Window Name = ", m_NameWndTgt);             
        }
        return hwnd_tgt;
    } 

    void SendMessage(long wparam, long lparam)
    {
        long hwnd_tgt = FindWindow();
        if(hwnd_tgt == 0 ) return; 

        SendMessageW(
            hwnd_tgt   // long hwnd
            , m_Msg    // int msg
            , wparam   // long wparam
            , lparam   // long lparam
        );
    } 

    void PostMessage(long wparam, long lparam)
    {
        long hwnd_tgt = FindWindow();
        if(hwnd_tgt == 0 ) return; 

        PostMessageW(
            hwnd_tgt   // long hwnd
            , m_Msg    // int msg
            , wparam   // long wparam
            , lparam   // long lparam
        );
    } 

}; // class CCy_WindowMessage

https://igotit.tistory.com/5820