问题
I'm trying to use JNA (Overview) to send messages to an application when minimized or not on top (mouse click for example), and the I found that people are using com.sun.jna.platform.win32.User32.SendMessageA( hW, 0x0201, 0, 0);
But i can't found this function in this class.
Can someone give me an example of how to implement it if I'm doing it wrong?
CODE:
User32 user32;
Pointer hW = user32.GetForegroundWindow().getPointer();
user32.SendMessageA( hW, 0x0201, 0, 0 );
回答1:
public interface User32Ext extends User32 {
User32Ext USER32EXT = (User32Ext) Native.loadLibrary("user32",
User32Ext.class, W32APIOptions.DEFAULT_OPTIONS);
HWND FindWindowEx(HWND lpParent, HWND lpChild, String lpClassName,
String lpWindowName);
HWND GetTopWindow(HWND hwnd);
HWND GetParent(HWND hwnd);
HWND GetDesktopWindow();
int SendMessage(HWND hWnd, int dwFlags, byte bVk, int dwExtraInfo);
int SendMessage(HWND hWnd, int Msg, int wParam, String lParam);
void keybd_event(byte bVk, byte bScan, int dwFlags, int dwExtraInfo);
void SwitchToThisWindow(HWND hWnd, boolean fAltTab);
}
回答2:
You need to define this function yourself. All windows functions are not predefined.
Example: (untested - usage example only)
public interface MyUser32 extends User32 {
MyUser32 INSTANCE = (MyUser32)Native.loadLibrary("user32", MyUser32.class, W32APIOptions.DEFAULT_OPTIONS);
LRESULT SendMessage(HWND hWnd, int Msg, WPARAM wParam, LPARAM lParam);
}
来源:https://stackoverflow.com/questions/15050750/java-jna-sendmessage-not-found