Windows SDK programming RichEdit Create, display files like hex editor

Compilation environment: Windows 7 64-bit VS2010, project creation Select "Win32 Project"

Note Add several header files

#include <WinBase.h>
#include <commctrl.h>
#include <Commdlg.h>
#include <Richedit.h>
#include <malloc.h>

Found in main file: main function added

Loading RichEdit Control Library files
HINSTANCE Hrich;
Hrich = LoadLibrary (TEXT ("Riched20.dll")); RICHED20.dll

The main function is added last:

Uninstalling the RichEdit control library file
FreeLibrary (Hrich);

Add a message in the message loop:

Note in the main file header, define a RichEdit control handle variable, static HWND hrichedit;

Wm_create:

Create a RichEdit control and set the default font, and size

Hrichedit =createwindowex (Ws_ex_clientedge,text ("richedit20a"), NULL,
Ws_child | ws_visible |                                                           Ws_vscroll | Ws_hscroll | Es_multiline | Es_nohidesel,
0,0,0,0,hwnd,0,hinst,null);

stcf.cbsize = sizeof (STCF);
Stcf.yheight = 10 * 20;
Stcf.dwmask = Cfm_face | Cfm_size | Cfm_bold;
wcscpy (stcf.szfacename,_t ("The Song Body"));

SendMessage (hrichedit,em_setcharformat,0, (LPARAM) &stcf);
SendMessage (hrichedit,em_exlimittext,0,-1);
Break

----Read the file and display the-------------
void Doreadfile (HWND hrichedit,const wchar_t Strfilename[max_path])
{
Open File ***********
if (hfile = CreateFile (Strfilename,generic_read | generic_write,file_share_read,null,open_existing,0,null)) = = Invalid_handle_value)
{

Return
}
Get file length *******
if (! ( Ifilelen = GetFileSize (hfile,null)))
{
MessageBox (null,_t ("hint"), _t ("file length is zero"), NULL);
Return
}

The following function establishes a memory-mapped file;
Hfilemap = CreateFileMapping (hfile,null,page_readwrite,0,0,null);
if (!HFILEMAP)
{

Return
}
Establish a mapping view and point to the first byte of the memory-mapped file with pbuffer.
Pbuffer= pbyte (MapViewOfFile (Hfilemap,file_map_read | file_map_write,0,0,0));
if (!pbuffer)
{

Return
}

wchar_t sz[4],szr[512];

Charrange stcf; Define structure, Em_exsetsel message requires this message,
memset (&stcf,0,sizeof (STCF)); and setting the member variable to 1 is the trailing text of the cursor
Stcf.cpmax =-1;
Stcf.cpmin =-1;
int count;

The following handles the byte stream and displays it in hexadecimal in the control

for (int j = 0;j<ifilelen/16;j++)
{
memset (sz,0,sizeof (SZ));
memset (szr,0,sizeof (SzR));
Count = 0;
for (int i = 0;i<16;i++)
{
wsprintf (sz,_t ("%02x"), Pbuffer[i]);
Wcscat (SZR,SZ);
count++;
}
Pbuffer + = count;
Wcscat (szr,_t ("\ r \ n")); The text is added to the newline escape character, which is implemented in the downstream output;

SendMessage (hrichedit,em_exsetsel,0, (LPARAM) &stcf);
SendMessage (hrichedit,em_replacesel,0, (LPARAM) SzR);
}

Closes the file handle, the memory-mapped file handle, and frees the memory;
UnmapViewOfFile (pbuffer);
CloseHandle (HFILEMAP);
CloseHandle (hfile);
}

Windows SDK programming RichEdit Create, display files like hex editor