Visual C ++ GetModuleFileName（）问题

Question

I have used the following code to open the executable file when a button is pressed:

private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
TCHAR buffer[MAX_PATH];
GetModuleFileName(NULL,buffer,sizeof(buffer));
ShellExecuteW(NULL, L"Open", buffer, NULL, NULL, SW_SHOWNORMAL);
}

I am now trying to open a PDF file by replacing the NULL with the PDF file name as shown:

GetModuleFileName(_T("testt.pdf"),buffer,sizeof(buffer));

When I compile this, I get the following error:

error C2664: 'GetModuleFileNameW' : cannot convert parameter 1 from 'const wchar_t [10]' to 'HMODULE'

Once this works, the exe file will be kept in a folder with the PDF but the directory for this file may be changed, will this code update automatically to accommodate for this since I have used the GetModuleFileName? Also, could someone please explain to me how I would fix this code?

Thank you.

Answer 1

Why do you think calling:

 GetModuleFileName(_T("testt.pdf"),buffer,sizeof(buffer));

will open a PDF file?

this function is defined as follows:

DWORD WINAPI GetModuleFileName(
  _In_opt_  HMODULE hModule,
  _Out_     LPTSTR lpFilename,
  _In_      DWORD nSize
);

---

example to comment:

ShellExecuteW(
    NULL, L"open",
    L"C:\\my.pdf",
    NULL, 
    NULL,
    SW_SHOWNORMAL
);