I am building win32 application which empties the clipboard when a screenshot is took.But the image is not emptying - winapi

Question

I am building a Win32 application which empties the clipboard when a screenshot is taken. But the image is not emptying.
BOOL CALLBACK EnumWindowsProc(HWND hWnd, LPARAM lParam) //callback function
{
TCHAR str[255];
if (!hWnd){
return TRUE; // Not a window
}
if (IsWindowVisible(hWnd)) {
if ((GetWindowLongPtr(hWnd, GWL_STYLE) & WS_ICONIC)) {
return TRUE; // Window is minimized
}
if (GetWindowText(hWnd, str, 255)) {
// LOGGER->info("In Screenshots detection, windows text: {}",wstringToString(str));
if (_wcsicmp(str, _T("Program Manager"))){
TCHAR proc_name[1024];
HANDLE proc_hnd = NULL;
DWORD proc_id;
int flag;
GetWindowThreadProcessId(hWnd, &proc_id);
proc_hnd = OpenProcess(PROCESS_ALL_ACCESS, TRUE, proc_id);
if (proc_hnd != NULL) {
flag = GetProcessImageFileName(proc_hnd, proc_name, 1024);
if (flag != 0) {
if (wcsstr(proc_name, _T("chrome.exe"))) {
if (OpenClipboard(NULL)) {
//if (OpenClipboard(0&)) {
EmptyClipboard(); //emptyng the clipboard
// SetClipboardData(CF_BITMAP, "");
CloseClipboard(); //closing the clipboard
LOGGER->info("Screen capture on chrome is blocked!");
}
else {
LOGGER->error("Error in denying scrn capture on chrome!,Error: {}",GetLastError());
}
}
}
}
return 1;
}
else {
return TRUE;
}
}
else {
return TRUE; // No window title
}
}
return TRUE;
}