Main code in C (that I could find) -


BOOL CALLBACK EnumWindowsProc(HWND hwnd,LPARAM lParam);
BOOL CALLBACK EnumWindowsProc2(HWND hwnd,LPARAM lParam);

LRESULT CALLBACK MainWndProc(HWND hWndMain,UINT Msg,UINT wParam,LONG lParam)
{
switch(Msg) {
case WM_COMMAND:
if(HIWORD(wParam)==BN_CLICKED)
EnumWindows(EnumWindowsProc,0); // call every main window
break;
case WM_DESTROY:
PostQuitMessage(0);
return 0L;
}
return DefWindowProc(hWndMain,Msg,wParam,lParam);
}

BOOL CALLBACK EnumWindowsProc(HWND hwnd,LPARAM lParam)
{
// call every child window (to find edit boxes)
EnumChildWindows(hwnd,EnumWindowsProc2,lParam);
return TRUE;
}

BOOL CALLBACK EnumWindowsProc2(HWND hwnd,LPARAM)
{
::SendMessage(hwnd,EM_SETPASSWORDCHAR,0,0); // reveal the password
InvalidateRect(hwnd,NULL,FALSE);
return TRUE;
}