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- /*
- *
- * FreeProcInstance
- *
- * This program demonstrates the use of the function FreeProcInstance.
- * This function frees the function specified bye the parameter from the
- * data segment bound to it by the MakeProcInstance function.
- *
- * Other references: DlgOpen.c, DlgSave.c, Print.c
- */
-
- #include <windows.h>
- #include "procinst.h"
-
- typedef struct {
- int nDummy;
- } SETUPDATA;
-
- static SETUPDATA strSetUpData;
- static HANDLE hInst;
- static char szFileName[] = "procinst";
- static char szFuncName[] = "FreeProcInstance";
-
- long FAR PASCAL WndProc (HANDLE, unsigned, WORD, LONG);
- BOOL FAR PASCAL TestFarFunc ();
-
- int PASCAL WinMain(hInstance, hPrevInstance, lpszCmdLine, cmdShow)
- HANDLE hInstance, hPrevInstance;
- LPSTR lpszCmdLine;
- int cmdShow;
- {
- HWND hWnd;
- MSG msg;
- if (!hPrevInstance)
- {
- WNDCLASS rClass;
-
- rClass.style = CS_HREDRAW | CS_VREDRAW;
- rClass.lpfnWndProc = WndProc;
- rClass.cbClsExtra = 0;
- rClass.cbWndExtra = 0;
- rClass.hInstance = hInstance;
- rClass.hCursor = LoadCursor (NULL, IDC_ARROW);
- rClass.hIcon = LoadIcon (hInstance, IDI_APPLICATION);
- rClass.hbrBackground = GetStockObject (WHITE_BRUSH);
- rClass.lpszMenuName = (LPSTR) NULL;
- rClass.lpszClassName = (LPSTR) szFileName;
-
- RegisterClass ((LPWNDCLASS) & rClass);
- }
- else
- GetInstanceData (hPrevInstance, (PSTR) & strSetUpData,
- sizeof (SETUPDATA));
-
- hInst = hInstance;
-
- hWnd = CreateWindow ((LPSTR) szFileName, (LPSTR) szFuncName,
- WS_OVERLAPPEDWINDOW,
- CW_USEDEFAULT, 0,
- CW_USEDEFAULT, 0,
- NULL, NULL, hInstance, NULL);
-
- ShowWindow (hWnd, cmdShow);
- UpdateWindow (hWnd);
-
- while (GetMessage((LPMSG) & msg, NULL, 0, 0))
- {
- TranslateMessage((LPMSG) & msg);
- DispatchMessage((LPMSG) & msg);
- }
- exit(msg.wParam);
- }
-
-
- BOOL FAR PASCAL TestFarFunc ()
- {
- return TRUE;
- }
-
- long FAR PASCAL WndProc (hWnd, iMessage, wParam, lParam)
- HWND hWnd ;
- unsigned iMessage ;
- WORD wParam ;
- LONG lParam ;
- {
- static HANDLE hInstance;
- FARPROC lpProc;
- HMENU hMenu;
- switch(iMessage)
- {
- case WM_CREATE:
- {
- hInstance = GetWindowWord(hWnd, GWW_HINSTANCE);
- hMenu = LoadMenu(hInstance, "ResMenu");
- SetMenu(hWnd, hMenu);
- DrawMenuBar(hWnd);
- break;
- }
- case WM_COMMAND:
- {
- switch(wParam)
- {
- case IDM_EXECUTE:
- {
- lpProc = MakeProcInstance ((FARPROC) TestFarFunc, hInst);
- MessageBox (NULL, (LPSTR)"Freeing procedure instance", (LPSTR)szFuncName, MB_OK);
- FreeProcInstance (lpProc);
- MessageBox (NULL, (LPSTR)"Instance procedure freed", (LPSTR)szFuncName, MB_OK);
- }
- }
- break;
- }
- case WM_DESTROY:
- {
- PostQuitMessage(0);
- break;
- }
- default:
- {
- return DefWindowProc (hWnd, iMessage, wParam, lParam) ;
- }
- }
- return (0L);
- }
-