- 1 year ago
Shell_NotifyIconA does not display the HICON provided
If the Shell_NotifyIconA
function is not displaying the HICON
(icon handle) provided, there could be a few potential causes. Here are some suggestions to address the issue:
Verify Icon Format: Ensure that the icon you are passing as the
HICON
parameter is in the correct format thatShell_NotifyIconA
expects. It should be a valid handle to an icon resource or a custom icon created usingLoadIcon
,LoadImage
, or similar functions.Icon Size: Check the size of the icon you are using. The
Shell_NotifyIconA
function expects the icon to be in the standard system tray icon size, typically 16x16 pixels. If the icon is of a different size, it may not display correctly or may be scaled or cropped by the system.Set Icon Information Properties: Ensure that you are correctly setting the necessary properties of the
NOTIFYICONDATA
structure before callingShell_NotifyIconA
. Some important properties to set includecbSize
,hwnd
,uID
,uFlags
, andhIcon
. Refer to the documentation forNOTIFYICONDATA
to verify that all required fields are correctly set.Verify Window Handle: Ensure that the
hwnd
(window handle) parameter passed toShell_NotifyIconA
is valid and refers to a visible window. The system tray icon is associated with a window, so if the providedhwnd
is not valid or refers to an invisible or closed window, the icon may not be displayed.Handle Return Value: Check the return value of the
Shell_NotifyIconA
function to determine if any errors are reported. A return value ofFALSE
indicates that an error occurred, and you can useGetLastError
to obtain the specific error code.Test on Different Systems: Test the code on different systems to ensure that it is not specific to a particular environment. Some visual aspects of the system tray and notification area can vary between different versions of Windows or with different system configurations.
By following these suggestions, you can address the issue of the Shell_NotifyIconA
function not displaying the provided HICON
. Review your code to ensure proper icon format, size, and properties, and verify that the window handle is valid. Checking return values and testing on different systems can also help identify any specific issues or discrepancies.