74 lines
1.6 KiB
Go
74 lines
1.6 KiB
Go
// 7 february 2014
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package main
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import (
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"syscall"
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"unsafe"
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)
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// TODO filter out commctrl.h stuff because the combobox and listbox stuff has values that differ between windows versions and bleh
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// either that or switch to ComboBoxEx and ListView because they might not have that problem???
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var (
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user32 = syscall.NewLazyDLL("user32.dll")
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kernel32 = syscall.NewLazyDLL("kernel32.dll")
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gdi32 = syscall.NewLazyDLL("gdi32.dll")
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)
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type HANDLE uintptr
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type HWND HANDLE
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type HBRUSH HANDLE
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type HMENU HANDLE
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const (
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NULL = 0
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FALSE = 0 // from windef.h
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TRUE = 1 // from windef.h
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)
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type ATOM uint16
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// TODO pull the thanks for these three from the old wingo source
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// TODO put these in windows.go
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type WPARAM uintptr
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type LPARAM uintptr
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type LRESULT uintptr
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func (w WPARAM) LOWORD() uint16 {
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// according to windef.h
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return uint16(w & 0xFFFF)
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}
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func (w WPARAM) HIWORD() uint16 {
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// according to windef.h
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return uint16((w >> 16) & 0xFFFF)
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}
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func LPARAMFromString(str string) LPARAM {
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return LPARAM(unsafe.Pointer(syscall.StringToUTF16Ptr(str)))
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}
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// microsoft's header files do this
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func MAKEINTRESOURCE(what uint16) uintptr {
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return uintptr(what)
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}
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// TODO adorn error messages with which step failed?
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func getText(hwnd HWND) (text string, err error) {
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var tc []uint16
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length, err := SendMessage(hwnd, WM_GETTEXTLENGTH, 0, 0)
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if err != nil {
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return "", err
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}
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tc = make([]uint16, length + 1)
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_, err = SendMessage(hwnd,
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WM_GETTEXT,
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WPARAM(length + 1),
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LPARAM(unsafe.Pointer(&tc[0])))
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if err != nil {
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return "", err
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}
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return syscall.UTF16ToString(tc), nil
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}
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