#include <windows.h>

int main(int argc, char ** argv)
{
HDC dc1, dc2, dc3;
DWORD type;
DWORD err1, err2;

dc1 = CreateCompatibleDC(NULL);
err1 = GetLastError();
type = GetObjectType(dc1);
err2 = GetLastError();
printf("dc1: %p %d err:0x%x/0x%x\n", dc1, type, err1, err2);

dc2 = CreateCompatibleDC(dc1);
err1 = GetLastError();
type = GetObjectType(dc2);
err2 = GetLastError();
printf("dc1: %p %d err:0x%x/0x%x\n", dc2, type, err1, err2);

dc3 = CreateCompatibleDC((HDC)0x12345);
err1 = GetLastError();
type = GetObjectType(dc3);
err2 = GetLastError();
printf("dc1: %p %d err:0x%x/0x%x\n", dc3, type, err1, err2);

}