postmessage的问题

[waff]

如何使用postmessage这个函数显示一个窗体：前提，我知道该窗体的Caption，也知道他的EXE名。

[打雷啦的专栏]

我是新手---这个是发送消息的，那就用消息响应函数里实现。
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说错了别怪我 嘿嘿

[ghgk]

嗯，先得用findwindow这个函数根据窗口Caption获得窗口句柄，不过我不知道这个函数能不能找到没有隐藏起来的窗口。得到句柄才可以用PostMessage这个函数根据窗体句柄向这个窗体的消息队列发送一条显示窗口的消息WM_SHOWWINDOW，别忘了附上这wParam和lParam
Syntax

WM_SHOWWINDOW

WPARAM wParam
LPARAM lParam;

Parameters

wParam
Specifies whether a window is being shown. If wParam is TRUE, the window is being shown. If wParam is FALSE, the window is being hidden.
lParam
Specifies the status of the window being shown. If lParam is zero, the message was sent because of a call to the ShowWindow function; otherwise, lParam is one of the following values.
SW_OTHERUNZOOM
The window is being uncovered because a maximize window was restored or minimized.
SW_OTHERZOOM
The window is being covered by another window that has been maximized.
SW_PARENTCLOSING
The window's owner window is being minimized.
SW_PARENTOPENING
The window's owner window is being restored.

[waff]

ghgk(红猪侠)

刚找了一个用该函数关闭某窗体的例子，好像wMsg的参数用的是MG_CLOSE=&H10
我就不明白，它是怎么知道&H10这个long型的消息标志符就是关闭该窗体，那显示隐藏的窗体的值是多少？

[waff]

可以找到隐藏的窗体并将其关闭

[waff]

ghgk(红猪侠)

PostMessage(winHwnd,&H10,0,0)
其中&H10是Long型的参数，意义是关闭窗体

那显示窗体的参数值是多少呢？

[ghgk]

Message或者说MG_CLOSE是一个常量，在winuser.h头文件中被定义。所以在程序中我们就以WM_SHOWWINDOWS表示这这个数字，你所说的MG_CLOSE也是这个意思。下面是一些常量订义的语句也包括WM_SHOWWINDOWS

#define WM_SETFOCUS 0x0007
#define WM_KILLFOCUS 0x0008
#define WM_ENABLE 0x000A
#define WM_SETREDRAW 0x000B
#define WM_SETTEXT 0x000C
#define WM_GETTEXT 0x000D
#define WM_GETTEXTLENGTH 0x000E
#define WM_PAINT 0x000F
#define WM_CLOSE 0x0010
#define WM_QUERYENDSESSION 0x0011
#define WM_QUIT 0x0012
#define WM_QUERYOPEN 0x0013
#define WM_ERASEBKGND 0x0014
#define WM_SYSCOLORCHANGE 0x0015
#define WM_ENDSESSION 0x0016
#define WM_SHOWWINDOW 0x0018
#define WM_WININICHANGE 0x001A
你需要的显示窗口的PostMessage语句，大概写的。不行的话对照上面给出的WM_SHOWWINDOWS的MSDN帮助处理吧
PostMessage (winHwnd, WM_SHOWWINDOWS, TRUE, SW_PARENTCLOSING);