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1.1 root 1: /****************************************************************************
2: *
3: *
4: * PROGRAM: Stereo.c
5: *
6: * PURPOSE: Example of a Control Panel Application
7: *
8: * FUNCTIONS:
9: *
10: * DllMain()
11: * InitStereoApplet()
12: * TermStereoApplet()
13: * CPIApplet()
14: * AmpDlgProc()
15: * TermDlgProc()
16: * TunerDlgProc()
17: *
18: * COMMENTS:
19: *
20: * The following code sample shows the CPlApplet function for a DLL containing
21: * three Control Panel applications that set preferences for a component stereo
22: * system attached to the computer. The sample uses an application-defined
23: * StereoApplets array that contains three structures, each corresponding to
24: * one of the Control Panel applications. Each structure contains all the
25: * information required by the CPL_NEWINQUIRE message, as well as the dialog
26: * box template and dialog box procedure required by the CPL_DBLCLK message.
27: * The code demonstrates how to fill the structures in the StereoApplets array.
28: *
29: ****************************************************************************/
30:
31: #include <windows.h>
32: #include <cpl.h>
33: #include "stereo.h"
34:
35: typedef struct tagApplets
36: {
37: int icon; // icon resource identifier
38: int namestring; // name-string resource identifier
39: int descstring; // description-string resource identifier
40: int dlgtemplate; // dialog box template resource identifier
41: DLGPROC dlgfn; // dialog box procedure
42: } APPLETS;
43:
44: APPLETS StereoApplets[] =
45: {
46: AMP_ICON, AMP_NAME, AMP_DESC, AMP_DLG, AmpDlgProc,
47: TUNER_ICON, TUNER_NAME, TUNER_DESC, TUNER_DLG, TunerDlgProc,
48: TAPE_ICON, TAPE_NAME, TAPE_DESC, TAPE_DLG, TapeDlgProc,
49:
50: };
51:
52: #define NUM_APPLETS (sizeof(StereoApplets)/sizeof(StereoApplets[0]))
53:
54:
55: HANDLE hModule = NULL;
56:
57: char szCtlPanel[30];
58:
59: /****************************************************************************
60: *
61: * FUNCTION: DllMain(PVOID, ULONG, PCONTEXT)
62: *
63: * PURPOSE: Win 32 Initialization DLL
64: *
65: * COMMENTS:
66: *
67: *
68: ****************************************************************************/
69:
70: BOOL WINAPI DllMain(
71: IN PVOID hmod,
72: IN ULONG ulReason,
73: IN PCONTEXT pctx OPTIONAL)
74: {
75: if (ulReason != DLL_PROCESS_ATTACH)
76: {
77: return TRUE;
78: }
79: else
80: {
81: hModule = hmod;
82: }
83:
84: return TRUE;
85:
86: UNREFERENCED_PARAMETER(pctx);
87: }
88:
89:
90: /****************************************************************************
91: *
92: * FUNCTION: InitStereoApplet(HWND)
93: *
94: * PURPOSE: loads the caption string for the Control Panel
95: *
96: * COMMENTS:
97: *
98: *
99: ****************************************************************************/
100:
101: BOOL InitStereoApplet (HWND hwndParent)
102: {
103: LoadString (hModule, CPCAPTION, szCtlPanel, sizeof(szCtlPanel));
104:
105: return TRUE;
106:
107: UNREFERENCED_PARAMETER(hwndParent);
108: }
109:
110:
111: /****************************************************************************
112: *
113: * FUNCTION: TermStereoApplet()
114: *
115: * PURPOSE: termination procedure for the stereo applets
116: *
117: * COMMENTS:
118: *
119: *
120: ****************************************************************************/
121:
122: void TermStereoApplet()
123: {
124: return;
125: }
126:
127:
128:
129: /****************************************************************************
130: *
131: * FUNCTION: CPIApplet(HWND, UINT, LONG, LONG)
132: *
133: * PURPOSE: Processes messages for control panel applets
134: *
135: * COMMENTS:
136: *
137: *
138: ****************************************************************************/
139: LONG CALLBACK CPlApplet (hwndCPL, uMsg, lParam1, lParam2)
140: HWND hwndCPL; // handle of Control Panel window
141: UINT uMsg; // message
142: LONG lParam1; // first message parameter
143: LONG lParam2; // second message parameter
144: {
145: int iApplet;
146: LPNEWCPLINFO lpNewCPlInfo;
147: static iInitCount = 0;
148:
149: switch (uMsg) {
150: case CPL_INIT: // first message, sent once
151: if (!iInitCount)
152: {
153: if (!InitStereoApplet(hwndCPL))
154: return FALSE;
155: }
156: iInitCount++;
157: return TRUE;
158:
159: case CPL_GETCOUNT: // second message, sent once
160: return (LONG)NUM_APPLETS;
161: break;
162:
163: case CPL_NEWINQUIRE: // third message, sent once per app
164: lpNewCPlInfo = (LPNEWCPLINFO) lParam2;
165:
166: iApplet = (int)(LONG)lParam1;
167: lpNewCPlInfo->dwSize = (DWORD) sizeof(NEWCPLINFO);
168: lpNewCPlInfo->dwFlags = 0;
169: lpNewCPlInfo->dwHelpContext = 0;
170: lpNewCPlInfo->lData = 0;
171: lpNewCPlInfo->hIcon = LoadIcon (hModule,
172: (LPCTSTR) MAKEINTRESOURCE(StereoApplets[iApplet].icon));
173: lpNewCPlInfo->szHelpFile[0] = '\0';
174:
175: LoadString (hModule, StereoApplets[iApplet].namestring,
176: lpNewCPlInfo->szName, 32);
177:
178: LoadString (hModule, StereoApplets[iApplet].descstring,
179: lpNewCPlInfo->szInfo, 64);
180: break;
181:
182: case CPL_SELECT: // application icon selected
183: break;
184:
185:
186: case CPL_DBLCLK: // application icon double-clicked
187: iApplet = (int)(LONG)lParam1;
188: MessageBeep (MB_ICONEXCLAMATION);
189:
190: DialogBox (hModule,
191: MAKEINTRESOURCE(StereoApplets[iApplet].dlgtemplate),
192: hwndCPL,
193: StereoApplets[iApplet].dlgfn);
194: break;
195:
196: case CPL_STOP: // sent once per app. before CPL_EXIT
197: break;
198:
199: case CPL_EXIT: // sent once before FreeLibrary called
200: iInitCount--;
201: if (!iInitCount)
202: TermStereoApplet();
203: break;
204:
205: default:
206: break;
207: }
208: return 0;
209: }
210:
211: /****************************************************************************
212: *
213: * FUNCTION: AmpDlgProc
214: *
215: * PURPOSE: Processes messages sent to the Amp applet.
216: *
217: * COMMENTS:
218: *
219: * This dialog simply puts up a box and has an OK key. It doesn't
220: * do anything except display.
221: *
222: ****************************************************************************/
223: BOOL APIENTRY AmpDlgProc (HWND hDlg, UINT message, UINT wParam, LONG lParam)
224: {
225: switch (message)
226: {
227: case WM_INITDIALOG:
228: return (TRUE);
229:
230: case WM_COMMAND:
231: if (LOWORD(wParam))
232: {
233: EndDialog(hDlg, TRUE);
234: return (TRUE);
235: }
236: break;
237: }
238: return (FALSE);
239: }
240:
241: /****************************************************************************
242: *
243: * FUNCTION: TunerDlgProc
244: *
245: * PURPOSE: Processes messages sent to the Tuner applet.
246: *
247: * COMMENTS:
248: *
249: * This dialog simply puts up a box and has an OK key. It doesn't
250: * do anything except display.
251: *
252: ****************************************************************************/
253: BOOL APIENTRY TunerDlgProc (HWND hDlg, UINT message, UINT wParam, LONG lParam)
254: {
255: switch (message)
256: {
257: case WM_INITDIALOG:
258: return (TRUE);
259:
260: case WM_COMMAND:
261: if (LOWORD(wParam))
262: {
263: EndDialog(hDlg, TRUE);
264: return (TRUE);
265: }
266: break;
267: }
268: return (FALSE);
269: }
270:
271: /****************************************************************************
272: *
273: * FUNCTION: TapeDlgProc
274: *
275: * PURPOSE: Processes messages sent to the Tape applet.
276: *
277: * COMMENTS:
278: *
279: * This dialog simply puts up a box and has an OK key. It doesn't
280: * do anything except display.
281: *
282: ****************************************************************************/
283: BOOL APIENTRY TapeDlgProc (HWND hDlg, UINT message, UINT wParam, LONG lParam)
284: {
285: switch (message)
286: {
287: case WM_INITDIALOG:
288: return (TRUE);
289:
290: case WM_COMMAND:
291: if (LOWORD(wParam))
292: {
293: EndDialog(hDlg, TRUE);
294: return (TRUE);
295: }
296: break;
297: }
298: return (FALSE);
299: }
300:
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