Defining buffer size correct “Stack around the variable String was corrupted”

Question

I have these two lines in my code:

TCHAR String[400] = {0};
SendMessageW(hwnd, WM_GETTEXT,sizeof(String), (LPARAM)String);

When I use it that w

Answer 1

You are using wchar_t, sizeof(String) will be 800, not 400. Fix:

wchar_t String[400] = 0;
SendMessageW(hwnd, WM_GETTEXT, sizeof(String) / sizeof(wchar_t), (LPARAM)String);