C / C++ / MFC

<br />
 hDevInfo = SetupDiGetClassDevs(NULL,<br />
        REGSTR_VAL_DISPLAY, // Enumerator<br />
        0,<br />
        DIGCF_PRESENT | DIGCF_ALLCLASSES );<br />
<br />
    DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);<br />
    for (i=0;SetupDiEnumDeviceInfo(hDevInfo,i,<br />
        &DeviceInfoData);i++)<br />
    {<br />
        DWORD DataT = REG_SZ;<br />
        LPTSTR buffer = NULL;<br />
        DWORD buffersize = 0;<br />
	    while (!SetupDiGetDeviceRegistryProperty(<br />
            hDevInfo,<br />
            &DeviceInfoData,<br />
            SPDRP_LOCATION_INFORMATION ,//, SPDRP_DEVICEDESC SPDRP_FRIENDLYNAME <br />
            &DataT,<br />
            (PBYTE)buffer,<br />
            buffersize,<br />
            &buffersize))<br />
        .........<br />

<br />
#include "car.h" // not important<br />
<br />
class carpark  <br />
{<br />
public:<br />
	carpark(int size);<br />
	~carpark();<br />
	<br />
	void insert(car *p1);<br />
<br />
	class Iterator;<br />
	friend class Iterator;<br />
	<br />
private:<br />
	car** array;<br />
};<br />
<br />
class carpark::Iterator<br />
{<br />
public:<br />
	Iterator(carpark &cp);<br />
	~Iterator();<br />
<br />
	void reset();<br />
	void next();<br />
	car* get();<br />
//private:<br />
	carpark &c;<br />
<br />
};<br />

<br />
carpark::Iterator::Iterator(carpark &cp)<br />
{<br />
	c = cp;<br />
}<br />

<br />
int main()<br />
{<br />
...<br />
	carpark::Iterator it();<br />
	it.reset(); // throws error "must have class/struct/union type"<br />
...<br />
}<br />