A pure SDK creates a form that can receive file drag and drop

#include <windows.h>
int WINAPI WinMain (hinstance hinstance,hinstance hprevinstance,lpstr lpcmdline,int);
BOOL initapplication (hinstance hinstance);
BOOL InitInstance (hinstance hinstance,int ncmdshow);
Lresult CALLBACK Mainwndproc (HWND hwnd,uint umsg,wparam wparam,lparam);
BOOL showfileinfo (HWND hwnd,hdc hdc,hdrop hdropinfo);
int WINAPI WinMain (hinstance hinstance,hinstance hprevinstance,lpstr lpcmdline,int)
{
MSG msg;
if (! InitApplication (HINSTANCE))
return FALSE;
if (! InitInstance (Hinstance,ncmdshow))
return FALSE;
while (GetMessage (&msg,null,0,0))
{
TranslateMessage (&AMP;MSG);
DispatchMessage (&AMP;MSG);
}
return msg.wparam;
}
BOOL initapplication (hinstance hinstance)
{
WNDCLASS WC;
Wc.style = 0;
Wc.lpfnwndproc = (WNDPROC) Mainwndproc;
Wc.cbclsextra = 0;
Wc.cbwndextra = 0;
Wc.hinstance = hinstance;
Wc.hicon = LoadIcon (null,idi_application);
Wc.hcursor = LoadCursor (Null,idc_arrow);
Wc.hbrbackground = Getstockobject (White_brush);
Wc.hbrbackground = (hbrush) getstockobject (White_brush);
Wc.lpszmenuname = NULL;
Wc.lpszclassname = "Dropfileclass";
Return registerclass (&AMP;WC);
}
BOOL InitInstance (hinstance hinstance,int ncmdshow)
{
HWND hwnd;
HWnd = CreateWindowEx (
0,
"Dropfileclass",
"Dropfile Demo",
Ws_overlappedwindow,
Cw_usedefault,
Cw_usedefault,
Cw_usedefault,
Cw_usedefault,
Null
Null
HINSTANCE,
Null
);
if (!hwnd)
return FALSE;
ShowWindow (hwnd,ncmdshow);
UpdateWindow (HWND);
return TRUE;
}
Lresult CALLBACK Mainwndproc (HWND hwnd,uint umsg,wparam Wparam,lparam)
{
HDC HDC;
Switch (umsg)
{
Case WM_CREATE:
DragAcceptFiles (hwnd,true);
Break
Case Wm_dropfiles:
Hdrop Hdropinfo;
Hdropinfo = (hdrop) WParam;
Hdropinfo = (HANDLE) WParam;
HDC = GetDC (hWnd);
Showfileinfo (Hwnd,hdc,hdropinfo);
Dragfinish (Hdropinfo);
ReleaseDC (HWND,HDC);
Break
Case Wm_destroy:
DragAcceptFiles (Hwnd,false);
PostQuitMessage (0);
Break
Default
return DefWindowProc (Hwnd,umsg,wparam,lparam);
}
return 0;
}
BOOL showfileinfo (HWND hwnd,hdc hdc,hdrop hdropinfo)
{
Point pt;
WORD Cfiles;
HINSTANCE Hcurrentinst;
Hicon Hicon;
Shfileinfo SFI;
Char lpszfile[80];
Char szbuff[1024];
Dragquerypoint (HDROPINFO,&AMP;PT);
Cfiles = Dragqueryfile (Hdropinfo, (UINT) 0xFFFFFFFF, (LPTSTR) null, (UINT) null);
if (Cfiles > 1)
{
wsprintf (Szbuff, "Dragfilenumber:%d", (int) cfiles);
TextOut (Hdc,pt.x,pt.y,szbuff,lstrlen (Szbuff));
return FALSE;
}
Else
{
Dragqueryfile (hdropinfo,0,lpszfile,sizeof (lpszfile));
if (Shgetfileinfo lpszfile,0,&sfi,sizeof (shfileinfo), Shgfi_displayname | Shgfi_typename))
{
memset (szbuff,0,sizeof (Szbuff));
wsprintf (Szbuff, "Name:%s Type:%s", sfi.szdisplayname,sfi.sztypename);
}
Hcurrentinst = (hinstance) GetWindowLong (hwnd,gwl_hinstance);
Hicon = ExtractIcon (hcurrentinst,lpszfile,0);
if (Hicon = NULL | | hicon = = (HICON) 1)
{
TextOut (Hdc,pt.x,pt.y,szbuff,lstrlen (Szbuff));
}
Else
{
DrawIcon (Hdc,pt.x,pt.y,hicon);
TextOut (Hdc,pt.x,pt.y + 32,szbuff,lstrlen (szbuff));
}
}
return TRUE;
}