C / C++ / MFC

#include <stdio.h>
#include <std.h>
int F; char s[256],*nl="\n";
void v(int i,int j){sprintf(s,"%1d,%-3d %c%c%c%c ",i,j,0xc0,j,i,0xc0);
    write(F,s,11);}
main(){int i,j; F=open("t$$",0x8002);
for(j=0;j<=84;j++) v(4,j); write(F,nl,1);
for(j=0;j<=34;j++) v(5,j); write(F,nl,1);
for(j=0;j<=234;j++) v(6,j); write(F,nl,1);
close(F);}

OPENFILENAME ofn;       // common dialog box structure
char szFile[1000];       // buffer for file name
HWND hwnd = GetConsoleWindow();              // owner window
HANDLE hf;              // file handle

//Initialize OPENFILENAME
ZeroMemory(&ofn, sizeof(ofn));
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = hwnd;
ofn.lpstrFile = szFile;
ofn.nMaxFile = sizeof(szFile);
ofn.lpstrFilter = "All\0*.*\0Text\0*.TXT\0";
ofn.nFilterIndex = 1;
ofn.lpstrFileTitle = NULL;
ofn.nMaxFileTitle = 0;
ofn.lpstrInitialDir = NULL;
ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;

// Display the Open dialog box.

if (GetOpenFileName(&ofn)==TRUE)
    hf = CreateFile(ofn.lpstrFile, GENERIC_READ,
        0, (LPSECURITY_ATTRIBUTES) NULL,
        OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL,
        (HANDLE) NULL);