为什么 Shell_NotifyIcon 气球提示不起作用?
根据我所看到的一切,当我在应用程序窗口中左键单击时,以下 C++ 程序应该从托盘图标显示气球工具提示,但它不起作用。 谁能告诉我我错过了什么?
这是在 XP 上使用 Shell32.dll 版本 6.0(使用 DllGetVersion 验证)。
谢谢!
#include "stdafx.h"
#include "shellapi.h"
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow)
{
MSG msg;
WNDCLASS wc;
memset(&wc, 0, sizeof(wc));
wc.lpfnWndProc = WndProc;
wc.hInstance = hInstance;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszClassName = "sysTrayTest";
RegisterClass(&wc);
HWND hWnd = CreateWindow("sysTrayTest", "",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, 500, 500,
NULL, NULL, hInstance, NULL);
if (hWnd)
{
ShowWindow(hWnd, nCmdShow);
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return 0;
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_DESTROY:
{
NOTIFYICONDATA nid;
memset(&nid, 0, sizeof(NOTIFYICONDATA));
nid.cbSize = sizeof(NOTIFYICONDATA);
nid.hWnd = hWnd;
nid.uID = 1;
Shell_NotifyIcon(NIM_DELETE, &nid);
PostQuitMessage(0);
}
break;
case WM_CREATE:
{
NOTIFYICONDATA nid;
memset(&nid, 0, sizeof(NOTIFYICONDATA));
nid.cbSize = sizeof(NOTIFYICONDATA);
nid.hWnd = hWnd;
nid.uID = 1;
nid.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
nid.uCallbackMessage = WM_USER + 200;
nid.hIcon = LoadIcon(NULL, IDI_INFORMATION);
lstrcpy (nid.szTip, "Test Tip");
Shell_NotifyIcon(NIM_ADD, &nid);
}
break;
case WM_LBUTTONDOWN:
{
NOTIFYICONDATA nid;
memset(&nid, 0, sizeof(NOTIFYICONDATA));
nid.cbSize = sizeof(NOTIFYICONDATA);
nid.hWnd = hWnd;
nid.uID = 1;
nid.uFlags = NIF_INFO;
lstrcpy(nid.szInfo, "Test balloon tip");
lstrcpy(nid.szInfoTitle, "Test Title");
nid.dwInfoFlags = NIIF_INFO;
nid.uTimeout = 15000;
Shell_NotifyIcon(NIM_MODIFY, &nid);
}
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
According to everything I've seen, the following C++ program should be displaying a balloon tool tip from the tray icon when I left-click in the application window, yet it's not working. Can anyone tell me what I'm missing?
This is on XP with version 6.0 of Shell32.dll (verified with DllGetVersion).
Thanks!
#include "stdafx.h"
#include "shellapi.h"
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow)
{
MSG msg;
WNDCLASS wc;
memset(&wc, 0, sizeof(wc));
wc.lpfnWndProc = WndProc;
wc.hInstance = hInstance;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszClassName = "sysTrayTest";
RegisterClass(&wc);
HWND hWnd = CreateWindow("sysTrayTest", "",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, 500, 500,
NULL, NULL, hInstance, NULL);
if (hWnd)
{
ShowWindow(hWnd, nCmdShow);
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return 0;
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_DESTROY:
{
NOTIFYICONDATA nid;
memset(&nid, 0, sizeof(NOTIFYICONDATA));
nid.cbSize = sizeof(NOTIFYICONDATA);
nid.hWnd = hWnd;
nid.uID = 1;
Shell_NotifyIcon(NIM_DELETE, &nid);
PostQuitMessage(0);
}
break;
case WM_CREATE:
{
NOTIFYICONDATA nid;
memset(&nid, 0, sizeof(NOTIFYICONDATA));
nid.cbSize = sizeof(NOTIFYICONDATA);
nid.hWnd = hWnd;
nid.uID = 1;
nid.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
nid.uCallbackMessage = WM_USER + 200;
nid.hIcon = LoadIcon(NULL, IDI_INFORMATION);
lstrcpy (nid.szTip, "Test Tip");
Shell_NotifyIcon(NIM_ADD, &nid);
}
break;
case WM_LBUTTONDOWN:
{
NOTIFYICONDATA nid;
memset(&nid, 0, sizeof(NOTIFYICONDATA));
nid.cbSize = sizeof(NOTIFYICONDATA);
nid.hWnd = hWnd;
nid.uID = 1;
nid.uFlags = NIF_INFO;
lstrcpy(nid.szInfo, "Test balloon tip");
lstrcpy(nid.szInfoTitle, "Test Title");
nid.dwInfoFlags = NIIF_INFO;
nid.uTimeout = 15000;
Shell_NotifyIcon(NIM_MODIFY, &nid);
}
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
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评论(3)
呸,我明白了。 由于某些原因,我的标题...
sizeof(NOTIFYICONDATA) == 508
而...
NOTIFYICONDATA
_
V3_
SIZE == 504NOTIFYICONDATA
_
V2_
大小 == 488NOTIFYICONDATA
_
V1_
SIZE == 88如果我指定 V2 或 V3 而不是 sizeof(NOTIFYICONDATA),气球提示就会显示得很好。
Bah, I figured it out. For some reason with the headers I have...
sizeof(NOTIFYICONDATA) == 508
whereas...
NOTIFYICONDATA
_
V3_
SIZE == 504NOTIFYICONDATA
_
V2_
SIZE == 488NOTIFYICONDATA
_
V1_
SIZE == 88If I specify either V2 or V3 instead of sizeof(NOTIFYICONDATA) the balloon tips show up just fine.
...下的注册表中检查了
您是否在... HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
EnableBalloonTips? 用户关闭它是很常见的事情。
Have you checked in the registry under ...
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
... for EnableBalloonTips? It's something very common for users to turn off.
问题是您假设当用户单击图标时 Windows 将向您发送
WM_LBUTTONDOWN
,但这是不正确的。WM_LBUTTONDOWN
仅当用户在 hWnd 的客户区域内单击时才发送,如果您仔细阅读NOTIFYICONDATA
的文档,您会发现当用户单击图标时 Windows 会向您发送一条WM_USER+20
消息(根据您的代码),并且在 lParam 参数中您将收到WM_LBUTTONDOWN
通知。The problem is that you are assuming Windows is going to send you a
WM_LBUTTONDOWN
when the user click on the icon, but that is not correct.WM_LBUTTONDOWN
is sent only when the user clicks inside the hWnd's client area, if you read carefully the documentation ofNOTIFYICONDATA
you will realize that when the user clicks the icon Windows will send you aWM_USER+20
message (according to your code) and in the lParam paramter you will get theWM_LBUTTONDOWN
notification.