tooltip是 另外的控间的,如下
/* CREATE A TOOLTIP CONTROL OVER THE ENTIRE WINDOW AREA */
void CreateMyTooltip (HWND hwnd)
{
// struct specifying control classes to register
INITCOMMONCONTROLSEX iccex;
HWND hwndTT; // handle to the ToolTip control
// struct specifying info about tool in ToolTip control
TOOLINFO ti;
unsigned int uid = 0; // for ti initialization
char strTT[30] = "This is your ToolTip string.";
LPTSTR lptstr = strTT;
RECT rect; // for client area coordinates