未公開(kāi)API函數(shù)揭秘——通用對(duì)話框

<P class=MsoNormal><SPAN lang=EN-US>COMDLG32.DLL </SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">為我們提供了一些很有用的對(duì)話框，但是仍然有部分我們可能會(huì)用到的系統(tǒng)對(duì)話框它卻沒(méi)有提供。如果試圖復(fù)制這些系統(tǒng)對(duì)話框?qū)⑹且患闊┑目嗖钍?。幸?lt;/SPAN><SPAN lang=EN-US>shell32.dll</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">為我們提供了這些對(duì)話框，本文將帶你去發(fā)掘一些未公開(kāi)的</SPAN><SPAN lang=EN-US>API</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">函數(shù)，以實(shí)現(xiàn)這些對(duì)話框。</SPAN></P>
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<P class=MsoNormal><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在使用未公開(kāi)的</SPAN><SPAN lang=EN-US>API</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">函數(shù)之前，你必須知道聲明未公開(kāi)的</SPAN><SPAN lang=EN-US>API</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">函數(shù)與聲明那些公開(kāi)的</SPAN><SPAN lang=EN-US>API</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">函數(shù)略有不同，那就是，你必須用到未公開(kāi)</SPAN><SPAN lang=EN-US>API</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">函數(shù)的順序號(hào)</SPAN><SPAN lang=EN-US>(ordinal number)</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。這個(gè)順序號(hào)就是未公開(kāi)函數(shù)的別名。也就是說(shuō)在聲明未公開(kāi)</SPAN><SPAN lang=EN-US>API</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">函數(shù)時(shí)，必須加上它的別名。例如下面要說(shuō)到的</SPAN><SPAN lang=EN-US>PickIconDlg</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">函數(shù)的順序號(hào)為</SPAN><SPAN lang=EN-US>62</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，它的別名就是</SPAN><SPAN lang=EN-US>"#62"</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。如果不這樣做，系統(tǒng)會(huì)提示你找不到函數(shù)的入口點(diǎn)。</SPAN></P>
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<P class=MsoNormal><SPAN lang=EN-US>BOOL WINAPI PickIconDlg(</SPAN></P>
$ v; Z# H3 e0 O<P class=MsoNormal><SPAN lang=EN-US>HWND hwndOwner, </SPAN></P>
# Q$ x/ O/ O+ }<P class=MsoNormal><SPAN lang=EN-US>LPSTR lpstrFile, </SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US>DWORD nMaxFile, </SPAN></P>
0 p/ [" a+ I2 j3 ~- i0 M<P class=MsoNormal><SPAN lang=EN-US>LPDWORD lpdwIconIndex);</SPAN></P>
<P class=MsoNormal><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">該函數(shù)的順序號(hào)為</SPAN><SPAN lang=EN-US>62</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。</SPAN></P>
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<P class=MsoNormal><SPAN lang=EN-US>hwndOwner</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">擁有該對(duì)話框的窗口句柄</SPAN><SPAN lang=EN-US> lpstrFile</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">指向一個(gè)緩沖，包含初始的文件名。函數(shù)返回后它就包含新的文件名。</SPAN><SPAN lang=EN-US>nMaxFile</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">指定緩沖的大小，以字符為單位。</SPAN><SPAN lang=EN-US> lpdwIconIndex</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">指向一個(gè)變量其中包含基于零的圖標(biāo)的索引。函數(shù)返回后它包含新圖標(biāo)的索引值。</SPAN> <SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">如果用戶選擇了圖標(biāo)，則返回值為真，如果用戶選擇取消按鈕或是系統(tǒng)菜單的關(guān)閉選項(xiàng)則返回值為假。</SPAN></P>
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<P class=MsoNormal><SPAN lang=EN-US>void WINAPI RunFileDlg(</SPAN></P>
9 K+ C" O' r' v9 N% d<P class=MsoNormal><SPAN lang=EN-US>HWND hwndOwner, </SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US>HICON hIcon, </SPAN></P>
! Z# j- M- i. u. _5 m2 Q3 x' N) x<P class=MsoNormal><SPAN lang=EN-US>LPCSTR lpstrDirectory, </SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US>LPCSTR lpstrTitle, </SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US>LPCSTR lpstrDescription,</SPAN></P>
; b7 n; r0 k" l, G<P class=MsoNormal><SPAN lang=EN-US>UINT uFlags);</SPAN></P>
<P class=MsoNormal><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">該函數(shù)的順序號(hào)為</SPAN><SPAN lang=EN-US>61</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。在</SPAN><SPAN lang=EN-US>VB</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中可聲明如下：</SPAN></P>
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* X' |& o7 z" \<P class=MsoNormal><SPAN lang=EN-US>Private Declare Function RunFileDlg Lib "shell32" Alias "#61" (ByVal hwndOwner As Long, ByVal hIcon As Long, ByVal lpstrDirectory As String, ByVal lpstrTitle As String, ByVal lpstrDescription As String, ByVal uFlags As Long) As Long</SPAN></P>
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. V3 Q9 H  R/ f/ h9 r<P class=MsoNormal><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">其中</SPAN><SPAN lang=EN-US>uFlags</SPAN><SPAN style="FONT-FAMILY: 宋體; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">參數(shù)的可選值為</SPAN></P>
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- y- K" I$ x7 v( C* ]<P class=MsoNormal><SPAN lang=EN-US>RFF_NOBROWSE 0x01 Removes the browse button. </SPAN></P>
$ J3 W& q/ R/ j6 p2 S$ O* t<P class=MsoNormal><SPAN lang=EN-US>RFF_NODEFAULT 0x02 No default item selected. </SPAN></P>
6 F9 P3 Q* e: c' R! @<P class=MsoNormal><SPAN lang=EN-US>RFF_CALCDIRECTORY 0x04 Calculates the working directory from the file name. </SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US>RFF_NOLABEL 0x08 Removes the edit box label. </SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US>RFF_NOSEPARATEMEM 0x20 Removes the Separate Memory Space check box (Windows NT only). </SPAN></P>