![]() A hung application/window shouldn't cause problems for other applications/windows. That would cause a huge problem for such things as the task switcher that would hang if one window is hung. The reason for this is simply because if GetWindowText would send the message to a window that is hung it would never return, hence hanging the process that call the function. But if you use GetWindowText on a control in another process it will return the text stored in this special memory area and not send a WM_GETTEXT message. Now, if you use the GetWindowText function it will send a WM_GETTEXT message if the window you're requesting the text for have been created by the same process that calls GetWindowText. GETWINDOWTEXT TO SETWINDOW TEXT WINDOWSSo when you send a WM_GETTEXT message, if the window/control doesn't handle that message itself, Windows will return the string stored in the dedicated memory area when the window was created, and it will replace it if a WM_SETTEXT message is sent. In that case the control handles the WM_GETTEXT and WM_GETTEXTLENGTH messages and returns whatever text they want/use. However the window/control can handle it themselfs, which is pretty common for a control to do. This is returned by GetWindowText or by sending WM_GETTEXT. If the system handles it it will store the text passed to CreateWindow/CreateWindowEx in a dedicated memory area. Either let system handle it or handle it themself. This explains why in a non-unicode build GetWindowText is the same as GetWindowTextAĪnother possibilty would be to use GetWindowTextA and do the whole thing with character strings, but that option may not be open to you.There is two different ways a window can handle its text. If you look at the declaration for GetWindowText you will find something like this: #ifdef _UNICODE in a hex memory view you may see something like 48 00 45 00 4C 00 4C 00 4F 00 00 00 - which a character string method would interpret as "H") When you use character-string methods on widestrings, they misbehave because widestrings often contain zeroes as the upper byte of the encoding, which the character-string methods interpret as a null terminator (e.g. ![]() ![]() You could use the MSVC ATL methods A2W and W2A although I would recommend using std::string and std::wstring whenever possible. wcslen) or converting from widestring to character-string as indicated here:Ĭ++ Convert string (or char*) to wstring (or wchar_t*) You need to be passing it a wchar_t array and then either working entirely in widestring (e.g. That would explain why you see a memory violation, because UTF-16 wide-chars contain 2 bytes you are effectively telling GetWindowTextW that the buffer can house 14 bytes, when it is actually only 7 bytes long. Note you will potentially overrun the end of the array since the nMaxCount parameter is number of characters, not number of bytes. GetWindowTextW provides output as a unicode widestring. I'm also confused about why did the strstr() function rises an memory violation when printing the output value to the console while just simply reading it doesnt raises any memoy violation GetWindowTextW(foreground, (LPWSTR)window_title, 7) ![]() Īnd my build is unicode so that was the problem i had to add that A at the end by why, also why when i get the window text using GetWindowTextW aka GetWindowText one char takes more space, i guess it's because of how i cast it right char window_title In a non-Unicode build, GetWindowText and GetWindowTextA are the same thing. GetWindowText(foreground, (LPWSTR)window_title, 7) Īuto output = strstr(window_title, "FiveM") Īnd got not output, everything was 0, but when i used the function GetWindowTextA() everything worked fine, so i googled some more about this getwindow function and i found this link and i saw this #define GetWindowText GetWindowTextA So i was googling and i found the GetWindowText function. To check if the "FiveM" name appears in the title bar of the window, because usually in this game the title bar also contains updates and so on I was having trouble getting a substring using strstr(a,b) ![]()
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