c#通过SendMessage发送消息,改变其他程序的下拉框控件(ComboBox)的值
IntPtr mwh = (IntPtr)Convert.ToInt32(handle); //ComboBox的句柄
int result = SendMessage(mwh, 0x014D, -1, selectStr); //改变ComboBox的值,selectStr为预期的下拉框选项
int mwh_p = GetWindowLong(mwh, -8); //获取ComboBox所属窗口的句柄
IntPtr mwh2 = (IntPtr)Convert.ToInt32(mwh_p); //转换ComboBox所属窗口的句柄
string cbn_selchange;
int cb_id = GetWindowLong(mwh, -12); //获取ComboBox的控件ID
cbn_selchange = "0001" + string.Format("{0:X4}", cb_id);
IntPtr s1 = (IntPtr)Convert.ToInt32(Tools.ToD(cbn_selchange, 16));
SendMessage(mwh2, 0x0111, s1, mwh); //给ComboBox所属窗口发送WM_COMMAND命令,第3个参数wParam是(CBN_SELCHANGE(高
位) + 控件ID(低位))
SendMessage(mwh2, 0x0111, s1, mwh);可以参考SPY++捕捉的消息日志
GetWindowLong的参数可以参考:
http://blog.csdn.net/hnhyhongmingjiang/archive/2008/03/06/2154410.aspx
SendMessage的参数可以参考: